├── .github └── workflows │ └── lint.yml ├── .gitignore ├── ARCHIVED.md ├── CNAME ├── CONTRIBUTING.md ├── Gemfile ├── LICENSE ├── README.md ├── about.md ├── assets ├── css │ ├── bootstrap-theme.css │ ├── bootstrap-theme.css.map │ ├── bootstrap-theme.min.css │ ├── bootstrap.css │ ├── bootstrap.css.map │ ├── bootstrap.min.css │ └── styles.css ├── fonts │ ├── glyphicons-halflings-regular.eot │ ├── glyphicons-halflings-regular.svg │ ├── glyphicons-halflings-regular.ttf │ └── glyphicons-halflings-regular.woff ├── img │ ├── The_Sentinel_BBC_1.png │ └── tapes.jpg └── js │ ├── Chart.min.js │ ├── bootstrap.js │ ├── bootstrap.min.js │ ├── jekyll-search.js │ ├── jquery.min.js │ └── venn.js ├── icons ├── Karakterisering_Characterization_DigitalPreservation.png ├── SmallCOPTRlogo.png ├── ic_check_24px.svg ├── noun_project_1050.png ├── noun_project_1191.png ├── noun_project_1266.png ├── noun_project_1330.png ├── noun_project_2038.png ├── noun_project_22.png ├── noun_project_2248.png ├── noun_project_2280.png ├── noun_project_566.png ├── noun_project_650.png ├── noun_project_872.png ├── picture.png └── understanding_format.png ├── mlc_config.json └── reminder.md /.github/workflows/lint.yml: -------------------------------------------------------------------------------- 1 | name: Awesome Lint 2 | 3 | on: 4 | push: 5 | branches: 6 | - main 7 | pull_request: 8 | schedule: 9 | # Run everyday at 5:00AM: 10 | - cron: "0 5 * * *" 11 | 12 | jobs: 13 | run-lint: 14 | runs-on: ubuntu-22.04 15 | steps: 16 | 17 | - uses: actions/checkout@master 18 | with: 19 | fetch-depth: 0 20 | 21 | - uses: actions/setup-node@master 22 | with: 23 | node-version: 18.x 24 | 25 | - name: Install awesome-lint CLI 26 | run: npm install -g awesome-lint 27 | 28 | - name: Run Awesome Lint 29 | run: awesome-lint 30 | 31 | - name: Check for broken links 32 | uses: gaurav-nelson/github-action-markdown-link-check@v1 33 | with: 34 | use-quiet-mode: 'yes' 35 | use-verbose-mode: 'yes' 36 | config-file: 'mlc_config.json' 37 | 38 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | _site 2 | *~ 3 | -------------------------------------------------------------------------------- /ARCHIVED.md: -------------------------------------------------------------------------------- 1 | # Archived 2 | 3 | A home for awesome digital preservation resources that are now obsolete. 4 | 5 | 6 | 7 | ## Contents 8 | 9 | ### Multi-format Corpora 10 | 11 | - [EDRM Internationalization Data Set](http://www.edrm.net/download/all_projects/data_set/EDRM_Data-Set_I18N_1-0.zip) - _Did not get archived by IA AFAICT._ 12 | - [Apache Tika's regression corpus](https://corpora.tika.apache.org/base/docs/) - Millions of files collected largely from govdocs1 and Common Crawl with oversampling on binary formats. - _[Tika Corpora no longer openly accessible](https://lists.apache.org/thread/l53lct6hjojwlhsfwcnzgtj5b1kpyo0h)_ 13 | - [Apache Tika's Bugtracker corpora](https://corpora.tika.apache.org/base/docs/bug_trackers/) - Dense set of problematic files -- attachments from bug trackers for open source parsers. - As above. 14 | 15 | 16 | ### Format Identification Tools 17 | 18 | - Identify formats now with [FIDOO](http://www.techmaurice.com/fidoo/), or [Interject](http://www.webarchive.org.uk/interject/inspect/) 19 | 20 | 21 | ### Registries 22 | 23 | - In order to improve our digital preservation capability, we need to be able to analyse and evaluate our work in an effective manner. For example, we need to be able to compare and contrast tools and approaches, and we need to see how changes over time affect performance. Practising what we preach in this field means sharing our data about digital preservation. [Share your digital preservation data using the Linked Data Simple Storage Specification](https://web-archive.southampton.ac.uk/lds3.org/). [Dave Tarrant explains why this is a good idea](https://openpreservation.org/blogs/years-registry-why-has-preservation-community-not-solved-problem-well-managed-and/). _NOTE: Links still work but service is offline/read-only._ 24 | 25 | 26 | 27 | -------------------------------------------------------------------------------- /CNAME: -------------------------------------------------------------------------------- 1 | www.digipres.org 2 | -------------------------------------------------------------------------------- /CONTRIBUTING.md: -------------------------------------------------------------------------------- 1 | # Contribution Guidelines 2 | 3 | This Awesome List is not intended to be wholly comprehensive, but to link out to other more comprehensive resources. The goal is to get people started, and to emphasis community-owned resources. 4 | 5 | The scope is also limited to digital preservation. Digitization is not in scope, and in general for web archiving we defer to the [Awesome Web Archiving List](https://github.com/iipc/awesome-web-archiving). 6 | 7 | Please ensure your pull request adheres to the following guidelines: 8 | 9 | - Search previous suggestions before making a new one, as yours may be a duplicate. 10 | - The pull request should have a meaningful title and include a link to the package / resource and why it's awesome. 11 | - Make an individual pull request for each suggestion. 12 | - Use the following format: `[resource](link) - Description by [Author](link to author)` 13 | - Use [title-casing](https://en.wikipedia.org/wiki/Title_case) (AP style). 14 | - Additions should be added to the bottom of the relevant category. 15 | - New categories, or improvements to the existing categorization are welcome. 16 | - Keep descriptions short and simple, but descriptive. 17 | - Start the description with a capital. 18 | - Check your spelling and grammar. 19 | 20 | Thank you for your suggestions! 21 | 22 | If you have any questions, you can discuss them with the DigiPres Commons community [here](https://github.com/orgs/digipres/discussions). -------------------------------------------------------------------------------- /Gemfile: -------------------------------------------------------------------------------- 1 | source 'https://rubygems.org' 2 | gem 'github-pages', group: :jekyll_plugins 3 | 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Creative Commons Legal Code 2 | 3 | CC0 1.0 Universal 4 | 5 | CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE 6 | LEGAL SERVICES. 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Affirmer understands and acknowledges that Creative Commons is not a 120 | party to this document and has no duty or obligation with respect to 121 | this CC0 or use of the Work. 122 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Awesome Digital Preservation [![Awesome](https://awesome.re/badge-flat.svg)](https://github.com/sindresorhus/awesome) 2 | 3 | > Carefully curated list of awesome digital preservation resources. 4 | 5 | This [Awesome List](https://github.com/sindresorhus/awesome/blob/main/awesome.md) is one a suite of community-owned resources for digital preservation. See [digipres.org](https://www.digipres.org) or [the digipres.org discussion forum](https://github.com/orgs/digipres/discussions) for more information. 6 | 7 | Contributions are welcome. Please add links through pull requests, or create an issue to start a discussion. Please refer to [CONTRIBUTING.md](CONTRIBUTING.md) for detailed guidance. And if obsolescence claims something awesome, there's always the [Archive](ARCHIVED.md). 8 | 9 | The text of an annual reminder email about these resources is also held here, in [reminder.md](reminder.md). This will be sent around various mailings list once per year, ahead of [World Digital Preservation Day](https://www.dpconline.org/events/world-digital-preservation-day). 10 | 11 | 12 | ## Contents 13 | 14 | 15 | 16 | - [Get Started](#get-started) 17 | - [Save Digital Stuff Right Now](#save-digital-stuff-right-now) 18 | - [Learn About Digital Preservation](#learn-about-digital-preservation) 19 | - [Find Formats](#find-formats) 20 | - [Experiment with Tools](#experiment-with-tools) 21 | - [Engage Stakeholders](#engage-stakeholders) 22 | - [Become Part Of The Digital Preservation Community](#become-part-of-the-digital-preservation-community) 23 | - [Store Digital Content](#store-digital-content) 24 | - [Create Preservation Metadata](#create-preservation-metadata) 25 | - [Find Test Files](#find-test-files) 26 | - [Multi-format Corpora](#multi-format-corpora) 27 | - [Format-specific Corpora](#format-specific-corpora) 28 | - [Building Corpora](#building-corpora) 29 | - [Sourcing test files from web archives](#sourcing-test-files-from-web-archives) 30 | - [Sourcing test files](#sourcing-test-files) 31 | - [Find More Tools](#find-more-tools) 32 | - [Build Workflows](#build-workflows) 33 | - [Improve The Tools](#improve-the-tools) 34 | - [Improving Identification](#improving-identification) 35 | - [Improving Characterisation/Metadata Extraction](#improving-characterisationmetadata-extraction) 36 | 37 | 38 | 39 | 40 | ## Get Started 41 | 42 | ### Save Digital Stuff Right Now 43 | 44 | Spotted digital data at risk, but don't know who can save it? 45 | 46 | - Save web pages via: 47 | - [Internet Archive Nominations](http://blog.archive.org/2013/10/25/fixing-broken-links/#save_page) 48 | - [archive.is](http://archive.is/) - Also known as _archive.today_. 49 | - [perma.cc](https://perma.cc/) 50 | - [webcitation.org](http://webcitation.org/) 51 | - [UK Web Archive Site Nomination](https://www.webarchive.org.uk/ukwa/info/nominate) - Suggest URLs for the UK Web Archive. _Note that UKWA is offline at present._ 52 | - Alert the [Archive Team](http://archiveteam.org/), and [help them save digital stuff](http://archiveteam.org/index.php?title=Who_We_Are) 53 | 54 | ### Learn About Digital Preservation 55 | 56 | - The [Getting Started chapter of the Digital Preservation Handbook](https://www.dpconline.org/handbook/getting-started) is a great place to start. 57 | - [The Digital Preservation Handbook Glossary](https://www.dpconline.org/handbook/glossary) - Introduces a lot of the core terminology. 58 | - For material that describes the broader issues, you can refer to [Digital Preservation on Wikipedia](https://en.wikipedia.org/wiki/Digital_preservation), and consider contributing to the [Digital Preservation Wikipedia Project](http://en.wikipedia.org/wiki/Wikipedia:WikiProject_Digital_Preservation). 59 | - Build your roadmap, guided by [the NDSA Levels of Digital Preservation](http://ndsa.org/activities/levels-of-digital-preservation/) 60 | - Use the [Digital Preservation Business Case Toolkit](http://wiki.dpconline.org/index.php?title=Digital_Preservation_Business_Case_Toolkit) to help get funding. 61 | - Understanding your costs can help to plan your preservation work more effectively. The [Curation Costs Exchange](http://www.curationexchange.org/) allows you to compare your costing data with that of many other organisations. 62 | - Learn about [Preserving digital Objects with Restricted Resources](http://digitalpowrr.niu.edu/) 63 | - Learn how to [Authenticate, Manage, and Preserve Video](https://archiving.witness.org/) -- WITNESS trains activists to archive and preserve their video so that human rights abuses cannot be denied or forgotten over time. 64 | - Explore and contribute to the [DP Requirements and Solutions wiki](http://wiki.opf-labs.org/display/REQ/Digital+Preservation+and+Data+Curation+Requirements+and+Solutions) 65 | - [Brainscape Digital Preservation Flash Cards](https://www.brainscape.com/p/1FA8-LH-5DKH7) - See for more information. 66 | 67 | ### Find Formats 68 | 69 | We need to understand the file formats of the resources we care for, and the software they depend on. 70 | 71 | - [Search across format registries](https://digipres.org/formats/) 72 | - Find or add formats to the [File Formats Wiki](http://justsolve.archiveteam.org) 73 | - Understand [file format risks](http://wiki.opf-labs.org/display/TR/OPF+File+Format+Risk+Registry) ([e.g. JP2](http://wiki.opf-labs.org/display/TR/JP2)) 74 | - [Game File Format Central (_archived version_)](https://web.archive.org/web/20230314075220/http://wiki.xentax.com/index.php/Game_File_Format_Central) - Community project documenting over 1300 game related file-formats. 75 | - [Just Solve It - File Formats Wiki](http://fileformats.archiveteam.org/wiki/Main_Page) - Community project documenting a wide-variety of file formats. 76 | 77 | If you have good examples of digital resources and their risks, please consider adding them to a test corpus. 78 | 79 | 80 | ### Experiment with Tools 81 | 82 | 83 | 84 | There are a lot of tools out there (see [the tools section below](#find-more-tools)), but some tools are particularly great for early experimentation. These tools can be used right in your web browser, so you can get started without installing software locally. 85 | 86 | #### Remote Services 87 | 88 | These tools are accessed using your browser, and work by sending a copy of your files to a remote server. 89 | 90 | - [Siegfried](http://www.itforarchivists.com/siegfried) - You can use the side bar to upload a file for Siegfried to identify the format. 91 | - [Online TrID File Identifier](https://mark0.net/onlinetrid.html) - A web service that identifies files using [TrID](https://mark0.net/soft-trid-e.html). 92 | 93 | #### In-Browser Tools 94 | 95 | These tools run entirely in your web browser, so no data is sent anywhere. 96 | 97 | - [Siegfried JS](https://siegfried-js.glitch.me/) - This runs the Siegfried format identification tool on your files in your browser. 98 | - [CyberChef](https://gchq.github.io/CyberChef/) - The Cyber Swiss Army Knife. Capable of running lots of basic data operations on text or files, including computing things like MD5 or SHA hashes. 99 | - [warc-analyser](https://edsu.github.io/warc-analyzer/) - Proof-of-concept that analyses WARC files in your browser. See for more information. 100 | - [Demystify Lite](https://ross-spencer.github.io/demystify-lite/) - This runs [Siegfried WASM](https://github.com/richardlehane/siegfried/tree/5e86c0355bcf30bc74e75bc3c4d3ee8a3be35ab8/wasm) on your files in your browser and outputs a [Demystify](https://github.com/exponential-decay/demystify) formatted report profiling your collection and highlighting files that might require specific attention during appraisal, such as duplicates; and through various preservation activities, such as caring for file names encoded using specific character-encodings. 101 | 102 | ### Engage Stakeholders 103 | 104 | - Visual examples of digital preservation challenges, such as graphic corruption, can be incredibly useful in communicating the digital preservation message. That's why we built the Atlas of Digital Damages [Gallery](http://www.flickr.com/groups/2121762@N23/) and [website](http://www.atlasofdigitaldamages.info). Please add your own images of a digital preservation challenge, failed rendering, encoding damage, corrupt data, or visual evidence documenting to the Atlas of Digital Damages. 105 | - Use the [POWRR One Pagers](http://powrr-wiki.lib.niu.edu/index.php/One_Pagers_tailored_to_educate_different_professionals) to educate stakeholders about the issues. 106 | - Working with your IT department (some responses arising from [this question on twitter](https://twitter.com/anjacks0n/status/809343452995522560): 107 | - Backup versus preservation: ["I had useful discussions about 'for the long-term' and what issues that might throw up as a starting point."](https://twitter.com/CriticalSteph/status/809365764549595136) 108 | - ["often it comes down to language - avoid the word archiving. means 1 thing to IT & another DP professionals"](https://twitter.com/pnwagner/status/809356219471302656) 109 | - [Ten IT skills you need to have to work with digital preservation](https://www.dpconline.org/blog/ten-it-skills-you-need) - written by [Dave Thompson](https://twitter.com/d_n_t) 110 | - ["Am going to go all Bruce Lee 'adjust to the object'. What drives IT? Delivery, efficiency, user needs etc."](https://twitter.com/C_Fryer/status/809547404366192642) 111 | 112 | 113 | ### Become Part Of The Digital Preservation Community 114 | 115 | Advance digital preservation by pooling our experience, sharing our stories and finding the answers to the big questions. 116 | 117 | - Q&A: 118 | - [Ask and answer digital preservation questions](http://qanda.digipres.org) 119 | - We tried to run a Digital Preservation Stack Exchange, but it didn't work out. The [content is available here](http://anjackson.github.io/zombse/) 120 | - Forums 121 | - Discussion forums and active [blogs](http://dpconline.org/blog) provide the opportunity to share informal advice and war stories, get recommendations and discuss the finer points of digital preservation. By sharing both your intentions for digital preservation work and your results, you can [ensure your work benefits from a wealth of community experience](http://openpreservation.org/blogs/2012-05-17-do-others-share-your-digital-preservation-challenges-and-know-about-best-solutions). 122 | - Discuss preservation issues on the [Digital Curation](https://groups.google.com/g/digital-curation) forum 123 | - Share war stories on [OPF](http://openpreservation.org/knowledge/blogs/) blogs 124 | - Mastodon - Join these federations with a digital preservation or general GLAM focus: 125 | - 126 | - 127 | - 128 | - 129 | - Twitter - Use these lists to find people to follow: 130 | - 131 | - 132 | - 133 | - 134 | - [r/DataHoarder](https://www.reddit.com/r/DataHoarder/) - "We are digital librarians." 135 | - [r/Archiveteam](https://www.reddit.com/r/Archiveteam/) - "Archive Team is a loose collective of rogue archivists, programmers, writers and loudmouths dedicated to saving our digital heritage." 136 | - Join the [Digital POWRR Slack](http://digitalpowrr.niu.edu/slack-off-with-digital-powrr/) 137 | - Face-to-Face communities/support groups: 138 | - [Digital Cultural Heritage DC](https://www.meetup.com/digital-cultural-heritage-dc/) 139 | - [Mid Michigan Digital Practitioners](https://midmichdp.wordpress.com/) 140 | - [XFR Collective: NYC-based media preservation membership organization preserving at-risk and obsolete audiovisual artwork by providing low-cost migration services](https://twitter.com/XFR_collective) 141 | - Collaborations (inc. groups that build things together): 142 | - [Association of Moving Image Archivists (AMIA) Open Source Committee on GitHub](https://github.com/amiaopensource) 143 | - [Zenodo Digital Preservation Community](https://zenodo.org/communities/digital-preservation/) - Building a comprehensive bibliography of publications, presentations, instructions and data sets related to digital preservation. 144 | - Models, Standards & Certification: 145 | - [The Reference Model for an Open Archival Information System (OAIS)](http://www.oais.info/) 146 | - [CoreTrustSeal](https://www.coretrustseal.org/) - CoreTrustSeal offers to any interested data repository a core level certification based on the Core Trustworthy Data Repositories Requirements. 147 | - Conferences: 148 | - [PASIG](http://www.preservationandarchivingsig.org/) 149 | - [iPres](https://ipres-conference.org/) 150 | - Membership organizations: 151 | - [DPC](http://dpconline.org/) (International) 152 | - [OPF](http://openpreservation.org/) (International) 153 | - [NCDD](http://www.ncdd.nl/) (Netherlands) 154 | - [NDSA](http://ndsa.org/) (USA) 155 | - [NESTOR](https://www.langzeitarchivierung.de/) (Germany) 156 | 157 | 158 | ## Store Digital Content 159 | 160 | - [A history of storage media](https://codewords.recurse.com/issues/seven/a-history-of-storage-media) 161 | - File system conventions: 162 | - [BagIt](https://en.wikipedia.org/wiki/BagIt) 163 | - [Oxford Common File Layout (OCFL)](https://ocfl.io/) 164 | 165 | 166 | ## Create Preservation Metadata 167 | 168 | - [The PREMIS Data Dictionary for Preservation Metadata](https://www.loc.gov/standards/premis/) 169 | - [Metadata Encoding & Transmission Standard (METS)](http://www.loc.gov/standards/mets/) 170 | - [Portland Common Data Model (PCDM)](https://pcdm.org/) 171 | - [Coalition for Content Provenance and Authenticity (C2PA)](https://c2pa.org/) - A related, emerging industry standard. 172 | - [WITNESS and the C2PA Harms and Misuse Assessment Process](https://blog.witness.org/2021/12/witness-and-the-c2pa-harms-and-misuse-assessment-process/) 173 | - [First Camera With CAI Content Credentials Introduced](https://www.carlseibert.com/first-camera-with-cai-content-credentials-introduced/) 174 | - [Mark the good stuff: Content provenance and the fight against disinformation (BBC)](https://www.bbc.co.uk/rd/blog/2024-03-c2pa-verification-news-journalism-credentials) 175 | - Some criticism and exploration of the the limitations of the C2PA approach: 176 | - [C2PA's Butterfly Effect](https://www.hackerfactor.com/blog/index.php?/archives/1010-C2PAs-Butterfly-Effect.html) - Broad context as well as limitations. 177 | - [IEEE, BBC, and C2PA](https://www.hackerfactor.com/blog/index.php?/archives/1024-IEEE,-BBC,-and-C2PA.html) - Includes detailed analysis of a specific case. 178 | 179 | ## Find Test Files 180 | 181 | To improve our digital preservation tools, we need to be able to test them and evaluate of their performance. Publicly available sample files make this much easier. Tool developers can use them to test their work, discover bugs, and hone their tools ready for others to use. A test corpus can contain real digital objects from a collection, or be created specifically for exhibiting certain characteristics for testing purposes. Real data, particularly with examples of broken, badly formed or corrupted files can be particularly useful. 182 | 183 | - See also [Where are the Born-Digital Archives Test Data Sets?](https://blogs.loc.gov/thesignal/2014/03/where-are-the-born-digital-archives-test-data-sets/) 184 | 185 | ### Multi-format Corpora 186 | 187 | - The [OPF Format Corpus](https://github.com/openpreserve/format-corpus) 188 | - The [iPres System Showcase Test Suite](http://www.webarchive.org.uk/datasets/ipres.ds.1/) - Hosted by the UK Web Archive. _Note that UKWA is offline at present._ 189 | - The [Encyclopedia of Graphics File Formats Companion CD-ROM](https://archive.org/details/EncyclopediaOfGraphicsFileFormatsCompanionCd-rom) contains lots of test files for image formats: 190 | - [EGFF ISO Image](https://archive.org/download/EncyclopediaOfGraphicsFileFormatsCompanionCd-rom/GFF_CD.ISO) 191 | - [EDRM Data Set Files (_archived version_)](https://web.archive.org/web/20150414060529/http://www.edrm.net/projects/dataset/data-set-files) 192 | - [EDRM File Formats Data Set 1.0.1 (_archived version_)](https://web.archive.org/web/20150414060529/http://www.edrm.net/download/all_projects/data_set/EDRM_Data-Set_File-Formats_1-0.zip) 193 | - [digitalcorpora.org's corpora](http://digitalcorpora.org/corpora/) - including [govdocs1](http://digitalcorpora.org/corpora/govdocs). 194 | - Open Preservation Foundation had a corpora page [(_archived version_)](https://web.archive.org/web/20191231165648/https://openpreservation.org/technology/corpora/). 195 | - OPF govdocs [here](https://web.archive.org/web/20191231165744/https://openpreservation.org/technology/corpora/govdocs/) 196 | - OPF also created a [by-format subset of govdocs1](https://web.archive.org/web/20191231202941/https://openpreservation.org/technology/corpora/govdocs-selected/). 197 | - [digicam corpus](https://github.com/thorsted/digicam_corpus) - Contains a corpus of Digital Camera files collected by Tyler Thorsted. 198 | - [The Skeleton Test Suite](https://github.com/exponential-decay/skeleton-test-suite) - Builds test files from PRONOM binary and container signatures. These can be used to test DROID and other (compatible) identification tools. 199 | - [Fine Free File Test Suite](https://fedorahosted.org/file-tests/) - Set up for Fedora testing. 200 | - [JHOVE's test files](http://jhove.cvs.sourceforge.net/viewvc/jhove/jhove/examples/) 201 | - [JHOVE2's test files](https://github.com/opf-labs/jhove2/tree/master/src/test/resources/examples/) 202 | - The [disktype test files](http://disktype.cvs.sourceforge.net/viewvc/disktype/file-system-sampler/) 203 | - The [Metadata Working Group specifications (_archived version_)](https://web.archive.org/web/20180402195758/http://www.metadataworkinggroup.org/specs/) and [embedded image metadata test corpus (_archived version_)](https://web.archive.org/web/20180402200035/http://www.metadataworkinggroup.org/specs/test_files.html) 204 | - [Apache Tika issue about setting up a nightly test corpus](https://issues.apache.org/jira/browse/TIKA-1302) - See also [tika-parsers/src/test/resources/test-documents](http://svn.apache.org/repos/asf/tika/trunk/tika-parsers/src/test/resources/test-documents/) 205 | - [The Chemical MIME Home Page](https://web.archive.org/web/20220321053449/https://www.ch.ic.ac.uk/chemime/) 206 | - [Online-convert.com example files](https://www.online-convert.com/file-type) (use [this link to browse the folder structure](https://example-files.online-convert.com/)) 207 | - [RDSS Archivematica Test Data Corpus](https://github.com/artefactual-labs/rdss-archivematica-test-data-corpus) - A collection of research dataset files used for testing Archivematica integration and functionality in the JISC Research Data Shared Service (RDSS). 208 | - [Archivematica Sample Data](https://github.com/artefactual/archivematica-sampledata) - Includes OPF format corpus, as well as other test material. 209 | - [ExifTool test files](https://sourceforge.net/p/exiftool/code/ci/master/tree/t/images/) - Test file folder in the source code directory tree. 210 | - [PREFORMA Ground Truth Classes](https://github.com/preforma/groundtruth) - Instructions how to reproduce validation-failing files for Matroska, FFV1, LPCM, TIFF, and PDF formats. 211 | - ["Small"](https://github.com/mathiasbynens/small) - Collection of "the smallest possible syntactically valid files in different programming/scripting/markup languages." 212 | - [MediaArea-RegressionTestingFiles](https://github.com/MediaArea/MediaArea-RegressionTestingFiles) - Public regression testing files for MediaArea. Contains AVI, FLV, MPEG Audio, MOV, MPEG-4, MPEG-PS, and Matroska files. 213 | - [TechSlides sample files for web development (_archived version_)](http://web.archive.org/web/20220124205507/http://techslides.com/sample-files-for-development) - Sample files for various image formats, video files, data structures, fonts, and web development files. 214 | - [Internet File Formats](https://archive.org/details/internet-file-formats-cd) - Companion CD-ROM to [Internet File Formats](https://archive.org/details/mac_Internet_File_Formats_1995), contains Sample Files and some File Format Specifications for a variety of common file formats circa 1995. 215 | - [Sembiance file format samples](https://sembiance.com/fileFormatSamples/) 216 | 217 | ### Format-specific Corpora 218 | 219 | #### PDF 220 | 221 | - [Adobe Acrobat Engineering (_archived version_)](https://web.archive.org/web/20141019002403/http://acroeng.adobe.com/wp) - Site has lots of useful [test documents (_archived version_)](https://web.archive.org/web/20130717012227/http://acroeng.adobe.com/wp/?page_id=10). 222 | - [Isartor PDF/A Test Suite](https://pdfa.org/resource/isartor-test-suite/) 223 | - [veraPDF Corpus](https://github.com/veraPDF/veraPDF-corpus) - For PDF/A. 224 | - [Synthetic PDF Testset for File Format Validation](http://doi.org/10.22000/53) - Test set for well formedness validation in JHOVE - see associated [paper](https://ipres-conference.org/ipres17/ipres2017.jp/wp-content/uploads/35Michelle-Lindlar.pdf). 225 | - [PDF Differences](https://github.com/pdf-association/pdf-differences) - Targeted test files that highlight specific portability and interoperability issues by the [PDF Association](https://pdfa.org/). 226 | - [PDF Cabinet of Horrors](http://opf-labs.org/format-corpus/pdfCabinetOfHorrors/) 227 | - [DARPA SafeDocs - 8 million non-truncated PDFs from a month of Common Crawl](https://digitalcorpora.org/corpora/file-corpora/cc-main-2021-31-pdf-untruncated/) 228 | - See also: [The PDF Association's list of PDF-focused corpora](https://github.com/pdf-association/pdf-corpora) 229 | 230 | #### ePub 231 | 232 | - [The IDPF ePub test suite](https://github.com/IDPF/epub-testsuite) 233 | - [KBNLresearch/epubPolicyTests](https://github.com/KBNLresearch/epubPolicyTests) - Some #epub samples with encryption, DTBook content and foreign resources, with corresponding #epubcheck output. 234 | 235 | 236 | #### TIFF 237 | 238 | - The libtiff [TIFF Test Images](http://www.libtiff.org/images.html) 239 | 240 | #### JPEG2000 241 | 242 | - [OPF JP2k test corpus](https://github.com/openpreserve/format-corpus/tree/master/jp2k-test) 243 | - [NITF version 2.1 JPEG 2000 Sample Imagery (_archived version_)](https://web.archive.org/web/20180413152928/http://www.gwg.nga.mil/ntb/baseline/software/testfile/Jpeg2000/index.htm) 244 | - [JPEG 2000 Part 4 Conformance Test Files (_archived version_)](http://web.archive.org/web/20080510121012/http://www.crc.ricoh.com/~gormish/jpeg2000conformance/) (v.1.5 with earlier versions also available in the archive history) 245 | - [openjpeg-data](https://github.com/uclouvain/openjpeg-data) - Test files for OpenJPEG. 246 | - [jpylyzer-test-files](https://github.com/openpreserve/jpylyzer-test-files) - Test files for Jpylyzer. 247 | 248 | #### Web Archives 249 | 250 | - [Internet Archive's Example ARC and WARC files](https://archive.org/details/ExampleArcAndWarcFiles) 251 | 252 | #### Databases 253 | 254 | - [SIARD test files](https://github.com/sfa-siard/SiardCmd/tree/master/testfiles) 255 | 256 | #### WordPerfect 257 | 258 | - [Corpora of seed files for oss-fuzz testing of libwpd](https://sourceforge.net/projects/libwpd/files/corpus/) - Covers various WordPerfect format versions. 259 | 260 | ### Building Corpora 261 | 262 | If the existing corpora aren't cutting it, perhaps you can contribute to the OPF Format Corpus hosted on GitHub. There's a [guide here on how to contribute (_archived version_)](https://web.archive.org/web/20221206180940/https://wiki.curatecamp.org/index.php/Collecting_format_ID_test_files) or you can [contact OPF](http://openpreservation.org/about/contact/) for help on how to get involved. 263 | 264 | ### Sourcing test files from web archives 265 | 266 | Web archives can provide a useful source of files of particular formats. For example, [search via the UKWA interface](https://www.webarchive.org.uk/shine/search?page=1&invert=&facet.fields=crawl_year&invert=&invert=&facet.fields=public_suffix&invert=&invert=&invert=&invert=&invert=&query=content_type%3A%22application%2Fmbox%22&totalCount=totalCount&order=asc). _Note that UKWA is offline at present._ 267 | 268 | ### Sourcing test files 269 | 270 | Tyler Thorsted's [File Formats - Finding Samples repository](https://github.com/thorsted/fileformat) lists various resources that can be used to find file format samples. 271 | 272 | ## Find More Tools 273 | 274 | Software tools give us the means the interrogate, manipulate, understand and ultimately preserve our digital data. The Community Owned digital Preservation Tool Registry, COPTR has unified five isolated tool registries. It provides an easy-to-edit wiki interface where we can share our knowledge about, and experiences with, tools used for digital preservation purposes. 275 | 276 | - Find tools to solve your challenges with the [POWRR Tools Grid](https://coptr.digipres.org/index.php/Tools_Grid), generated from the COPTR wiki. 277 | - Find tools [by function](http://coptr.digipres.org/Category:Function). 278 | - Contribute your experiences of using tools to the [COPTR wiki](http://coptr.digipres.org/). 279 | - If you find or create new tools, please [add them to COPTR](http://coptr.digipres.org/Guidelines_for_contributing_to_COPTR). 280 | 281 | 282 | ## Build Workflows 283 | 284 | Resources to help build up preservation workflows, e.g. templates for how to use command-line tools, and how to chain things together. 285 | 286 | - [ffmprovisr 'Making FFmpeg Easier'](http://amiaopensource.github.io/ffmprovisr/) (example of how to use `ffmpeg` to perform specific tasks) 287 | - [AMIA Open Source: List of open workflows for A/V resources](https://github.com/amiaopensource/open-workflows) 288 | 289 | ## Improve The Tools 290 | 291 | Contributing to the development and improvement of tools is easy, even if you're not technical. Check out [this guide to making small documentation edits, or raising issues on GitHub](http://ablwr.github.io/blog/2014/11/04/non-technical-persons-guide-to-becoming-an-open-source-software-contributor-via-github/) 292 | 293 | ### Improving Identification 294 | 295 | Identifying file formats is the bread and butter of digital preservation characterisation and assessment. Identification tool coverage and accuracy could be much better, and this primarily comes down to the signatures, or file format "magic", used to identify each format. You can help contribute and make our identification tools more effective here: 296 | 297 | - [A basic guide for writing format signatures](http://openpreservation.org/blogs/2012-02-09-basic-guide-writing-new-format-signatures) - Covers [Apache Tika](https://issues.apache.org/jira/browse/TIKA) and [DROID](http://www.nationalarchives.gov.uk/PRONOM/submitinfo.htm). 298 | - [DROID/PRONOM also has this official guide](http://www.nationalarchives.gov.uk/documents/information-management/pronom-file-signature-research.pdf) 299 | - [Contribute a file format signature to FILE](https://github.com/glensc/file) - See [this guide](http://www.openpreservation.org/blogs/2012-08-09-magic-editing-and-creation-primer). 300 | 301 | ### Improving Characterisation/Metadata Extraction 302 | 303 | Deep file characterisation enables validation, identification of preservation risks and extraction of metadata. In developing a new characterisation capability, begin with thorough research to identify existing code to re-use or build on, develop a focused command line tool, then consider turning it into a JHOVE module. 304 | 305 | - Develop a new file characterisation capability and turn it into a [JHOVE module](http://jhove.openpreservation.org/documentation/dev-module/), or an [Apache Tika](https://tika.apache.org/) module. 306 | -------------------------------------------------------------------------------- /about.md: -------------------------------------------------------------------------------- 1 | --- 2 | title: New Collaborative Resources for Digital Preservation 3 | permalink: /about/ 4 | --- 5 | The Digital POWRR Project, in collaboration with the COPTR Consortium*, is pleased to announce version 2 of the Digital POWRR Tools Grid. The Grid helps practitioners find software tools to solve their digital preservation challenges. 6 | 7 | [http://www.digipres.org/tools/](http://www.digipres.org/tools/) 8 | 9 | The new Tools Grid provides information about almost 400 digital preservation tools by combining the graphical style of the first POWRR Grid with live data from the COPTR registry. 10 | 11 | The Tools Grid can be found on a new domain for community owned digital preservation resources: Digipres Commons. 12 | 13 | [http://www.digipres.org/](http://www.digipres.org/) 14 | 15 | Digipres highlights useful collaborative preservation resources from around the web as well as hosting these other collaborative services: 16 | 17 | * The COPTR tools registry 18 | * The Digital Preservation Question and Answer site 19 | * The File Formats aggregation service 20 | 21 | Digipres Commons is community owned and run, so it needs your contributions to make it better. We will be organising various community events to continue to build all the resources highlighted by Digipres, but you can get involved and contribute now. Here's how: 22 | 23 | [http://www.digipres.org/how_to_contribute_main.html](http://www.digipres.org/how_to_contribute_main.html) 24 | 25 | \* _The COPTR Consortium is: Aligning National Approaches to Digital Preservation (ANADP), The Open Preservation Foundation (OPF), The National Digital Stewardship Alliance (NDSA), The Digital Curation Centre (DCC), The Digital Curation Exchange (DCE) and the Digital POWRR Project._ 26 | 27 | Digipres Commons is kindly hosted by the Open Preservation Foundation. Development of the POWRR Tool Grid was made possible by the Digital POWRR Project and the Northern Illinois University. 28 | -------------------------------------------------------------------------------- /assets/css/bootstrap-theme.css: -------------------------------------------------------------------------------- 1 | /*! 2 | * Bootstrap v3.2.0 (http://getbootstrap.com) 3 | * Copyright 2011-2014 Twitter, Inc. 4 | * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) 5 | */ 6 | 7 | .btn-default, 8 | .btn-primary, 9 | .btn-success, 10 | .btn-info, 11 | .btn-warning, 12 | .btn-danger { 13 | text-shadow: 0 -1px 0 rgba(0, 0, 0, .2); 14 | -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 1px rgba(0, 0, 0, .075); 15 | box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 1px rgba(0, 0, 0, .075); 16 | } 17 | .btn-default:active, 18 | .btn-primary:active, 19 | .btn-success:active, 20 | .btn-info:active, 21 | .btn-warning:active, 22 | 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repeat-x; 121 | border-color: #28a4c9; 122 | } 123 | .btn-info:hover, 124 | .btn-info:focus { 125 | background-color: #2aabd2; 126 | background-position: 0 -15px; 127 | } 128 | .btn-info:active, 129 | .btn-info.active { 130 | background-color: #2aabd2; 131 | border-color: #28a4c9; 132 | } 133 | .btn-info:disabled, 134 | .btn-info[disabled] { 135 | background-color: #2aabd2; 136 | background-image: none; 137 | } 138 | .btn-warning { 139 | background-image: -webkit-linear-gradient(top, #f0ad4e 0%, #eb9316 100%); 140 | background-image: -o-linear-gradient(top, #f0ad4e 0%, #eb9316 100%); 141 | background-image: -webkit-gradient(linear, left top, left bottom, from(#f0ad4e), to(#eb9316)); 142 | background-image: linear-gradient(to bottom, #f0ad4e 0%, #eb9316 100%); 143 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff0ad4e', endColorstr='#ffeb9316', GradientType=0); 144 | filter: progid:DXImageTransform.Microsoft.gradient(enabled = false); 145 | background-repeat: repeat-x; 146 | border-color: #e38d13; 147 | } 148 | .btn-warning:hover, 149 | .btn-warning:focus { 150 | background-color: #eb9316; 151 | background-position: 0 -15px; 152 | } 153 | .btn-warning:active, 154 | .btn-warning.active { 155 | background-color: #eb9316; 156 | border-color: #e38d13; 157 | } 158 | .btn-warning:disabled, 159 | .btn-warning[disabled] { 160 | background-color: #eb9316; 161 | background-image: none; 162 | } 163 | .btn-danger { 164 | background-image: -webkit-linear-gradient(top, #d9534f 0%, #c12e2a 100%); 165 | background-image: -o-linear-gradient(top, #d9534f 0%, #c12e2a 100%); 166 | background-image: -webkit-gradient(linear, left top, left bottom, from(#d9534f), to(#c12e2a)); 167 | background-image: linear-gradient(to bottom, #d9534f 0%, #c12e2a 100%); 168 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9534f', endColorstr='#ffc12e2a', GradientType=0); 169 | filter: progid:DXImageTransform.Microsoft.gradient(enabled = false); 170 | background-repeat: repeat-x; 171 | border-color: #b92c28; 172 | } 173 | .btn-danger:hover, 174 | .btn-danger:focus { 175 | background-color: #c12e2a; 176 | background-position: 0 -15px; 177 | } 178 | .btn-danger:active, 179 | .btn-danger.active { 180 | background-color: #c12e2a; 181 | border-color: #b92c28; 182 | } 183 | .btn-danger:disabled, 184 | .btn-danger[disabled] { 185 | background-color: #c12e2a; 186 | background-image: none; 187 | } 188 | .thumbnail, 189 | .img-thumbnail { 190 | -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .075); 191 | box-shadow: 0 1px 2px rgba(0, 0, 0, .075); 192 | } 193 | .dropdown-menu > li > a:hover, 194 | .dropdown-menu > li > a:focus { 195 | background-color: #e8e8e8; 196 | background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%); 197 | background-image: -o-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%); 198 | background-image: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#e8e8e8)); 199 | background-image: linear-gradient(to bottom, #f5f5f5 0%, #e8e8e8 100%); 200 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff5f5f5', endColorstr='#ffe8e8e8', GradientType=0); 201 | background-repeat: repeat-x; 202 | } 203 | .dropdown-menu > .active > a, 204 | .dropdown-menu > .active > a:hover, 205 | .dropdown-menu > .active > a:focus { 206 | background-color: #357ebd; 207 | background-image: -webkit-linear-gradient(top, #428bca 0%, #357ebd 100%); 208 | background-image: -o-linear-gradient(top, #428bca 0%, #357ebd 100%); 209 | background-image: -webkit-gradient(linear, left top, left bottom, from(#428bca), to(#357ebd)); 210 | background-image: linear-gradient(to bottom, #428bca 0%, #357ebd 100%); 211 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff357ebd', GradientType=0); 212 | background-repeat: repeat-x; 213 | } 214 | .navbar-default { 215 | background-image: -webkit-linear-gradient(top, #fff 0%, #f8f8f8 100%); 216 | background-image: -o-linear-gradient(top, #fff 0%, #f8f8f8 100%); 217 | background-image: -webkit-gradient(linear, left top, left bottom, from(#fff), to(#f8f8f8)); 218 | background-image: linear-gradient(to bottom, #fff 0%, #f8f8f8 100%); 219 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffffff', endColorstr='#fff8f8f8', GradientType=0); 220 | filter: progid:DXImageTransform.Microsoft.gradient(enabled = false); 221 | background-repeat: repeat-x; 222 | border-radius: 4px; 223 | -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075); 224 | box-shadow: inset 0 1px 0 rgba(255, 255, 255, .15), 0 1px 5px rgba(0, 0, 0, .075); 225 | } 226 | .navbar-default .navbar-nav > .active > a { 227 | background-image: -webkit-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%); 228 | background-image: -o-linear-gradient(top, #ebebeb 0%, #f3f3f3 100%); 229 | background-image: -webkit-gradient(linear, left top, left bottom, from(#ebebeb), to(#f3f3f3)); 230 | background-image: linear-gradient(to bottom, #ebebeb 0%, #f3f3f3 100%); 231 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffebebeb', endColorstr='#fff3f3f3', GradientType=0); 232 | background-repeat: repeat-x; 233 | -webkit-box-shadow: inset 0 3px 9px rgba(0, 0, 0, .075); 234 | box-shadow: inset 0 3px 9px rgba(0, 0, 0, .075); 235 | } 236 | .navbar-brand, 237 | .navbar-nav > li > a { 238 | text-shadow: 0 1px 0 rgba(255, 255, 255, .25); 239 | } 240 | .navbar-inverse { 241 | background-image: -webkit-linear-gradient(top, #3c3c3c 0%, #222 100%); 242 | background-image: -o-linear-gradient(top, #3c3c3c 0%, #222 100%); 243 | background-image: -webkit-gradient(linear, left top, left bottom, from(#3c3c3c), to(#222)); 244 | background-image: linear-gradient(to bottom, #3c3c3c 0%, #222 100%); 245 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff3c3c3c', endColorstr='#ff222222', GradientType=0); 246 | filter: progid:DXImageTransform.Microsoft.gradient(enabled = false); 247 | background-repeat: repeat-x; 248 | } 249 | .navbar-inverse .navbar-nav > .active > a { 250 | background-image: -webkit-linear-gradient(top, #222 0%, #282828 100%); 251 | background-image: -o-linear-gradient(top, #222 0%, #282828 100%); 252 | background-image: -webkit-gradient(linear, left top, left bottom, from(#222), to(#282828)); 253 | background-image: linear-gradient(to bottom, #222 0%, #282828 100%); 254 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff222222', endColorstr='#ff282828', GradientType=0); 255 | background-repeat: repeat-x; 256 | -webkit-box-shadow: inset 0 3px 9px rgba(0, 0, 0, .25); 257 | box-shadow: inset 0 3px 9px rgba(0, 0, 0, .25); 258 | } 259 | .navbar-inverse .navbar-brand, 260 | .navbar-inverse .navbar-nav > li > a { 261 | text-shadow: 0 -1px 0 rgba(0, 0, 0, .25); 262 | } 263 | .navbar-static-top, 264 | .navbar-fixed-top, 265 | .navbar-fixed-bottom { 266 | border-radius: 0; 267 | } 268 | .alert { 269 | text-shadow: 0 1px 0 rgba(255, 255, 255, .2); 270 | -webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25), 0 1px 2px rgba(0, 0, 0, .05); 271 | box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25), 0 1px 2px rgba(0, 0, 0, .05); 272 | } 273 | .alert-success { 274 | background-image: -webkit-linear-gradient(top, #dff0d8 0%, #c8e5bc 100%); 275 | background-image: -o-linear-gradient(top, #dff0d8 0%, #c8e5bc 100%); 276 | background-image: -webkit-gradient(linear, left top, left bottom, from(#dff0d8), to(#c8e5bc)); 277 | background-image: linear-gradient(to bottom, #dff0d8 0%, #c8e5bc 100%); 278 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdff0d8', endColorstr='#ffc8e5bc', GradientType=0); 279 | background-repeat: repeat-x; 280 | border-color: #b2dba1; 281 | } 282 | .alert-info { 283 | background-image: -webkit-linear-gradient(top, #d9edf7 0%, #b9def0 100%); 284 | background-image: -o-linear-gradient(top, #d9edf7 0%, #b9def0 100%); 285 | background-image: -webkit-gradient(linear, left top, left bottom, from(#d9edf7), to(#b9def0)); 286 | background-image: linear-gradient(to bottom, #d9edf7 0%, #b9def0 100%); 287 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9edf7', endColorstr='#ffb9def0', GradientType=0); 288 | background-repeat: repeat-x; 289 | border-color: #9acfea; 290 | } 291 | .alert-warning { 292 | background-image: -webkit-linear-gradient(top, #fcf8e3 0%, #f8efc0 100%); 293 | background-image: -o-linear-gradient(top, #fcf8e3 0%, #f8efc0 100%); 294 | background-image: -webkit-gradient(linear, left top, left bottom, from(#fcf8e3), to(#f8efc0)); 295 | background-image: linear-gradient(to bottom, #fcf8e3 0%, #f8efc0 100%); 296 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fffcf8e3', endColorstr='#fff8efc0', GradientType=0); 297 | background-repeat: repeat-x; 298 | border-color: #f5e79e; 299 | } 300 | .alert-danger { 301 | background-image: -webkit-linear-gradient(top, #f2dede 0%, #e7c3c3 100%); 302 | background-image: -o-linear-gradient(top, #f2dede 0%, #e7c3c3 100%); 303 | background-image: -webkit-gradient(linear, left top, left bottom, from(#f2dede), to(#e7c3c3)); 304 | background-image: linear-gradient(to bottom, #f2dede 0%, #e7c3c3 100%); 305 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff2dede', endColorstr='#ffe7c3c3', GradientType=0); 306 | background-repeat: repeat-x; 307 | border-color: #dca7a7; 308 | } 309 | .progress { 310 | background-image: -webkit-linear-gradient(top, #ebebeb 0%, #f5f5f5 100%); 311 | background-image: -o-linear-gradient(top, #ebebeb 0%, #f5f5f5 100%); 312 | background-image: -webkit-gradient(linear, left top, left bottom, from(#ebebeb), to(#f5f5f5)); 313 | background-image: linear-gradient(to bottom, #ebebeb 0%, #f5f5f5 100%); 314 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffebebeb', endColorstr='#fff5f5f5', GradientType=0); 315 | background-repeat: repeat-x; 316 | } 317 | .progress-bar { 318 | background-image: -webkit-linear-gradient(top, #428bca 0%, #3071a9 100%); 319 | background-image: -o-linear-gradient(top, #428bca 0%, #3071a9 100%); 320 | background-image: -webkit-gradient(linear, left top, left bottom, from(#428bca), to(#3071a9)); 321 | background-image: linear-gradient(to bottom, #428bca 0%, #3071a9 100%); 322 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff3071a9', GradientType=0); 323 | background-repeat: repeat-x; 324 | } 325 | .progress-bar-success { 326 | background-image: -webkit-linear-gradient(top, #5cb85c 0%, #449d44 100%); 327 | background-image: -o-linear-gradient(top, #5cb85c 0%, #449d44 100%); 328 | background-image: -webkit-gradient(linear, left top, left bottom, from(#5cb85c), to(#449d44)); 329 | background-image: linear-gradient(to bottom, #5cb85c 0%, #449d44 100%); 330 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5cb85c', endColorstr='#ff449d44', GradientType=0); 331 | background-repeat: repeat-x; 332 | } 333 | .progress-bar-info { 334 | background-image: -webkit-linear-gradient(top, #5bc0de 0%, #31b0d5 100%); 335 | background-image: -o-linear-gradient(top, #5bc0de 0%, #31b0d5 100%); 336 | background-image: -webkit-gradient(linear, left top, left bottom, from(#5bc0de), to(#31b0d5)); 337 | background-image: linear-gradient(to bottom, #5bc0de 0%, #31b0d5 100%); 338 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff5bc0de', endColorstr='#ff31b0d5', GradientType=0); 339 | background-repeat: repeat-x; 340 | } 341 | .progress-bar-warning { 342 | background-image: -webkit-linear-gradient(top, #f0ad4e 0%, #ec971f 100%); 343 | background-image: -o-linear-gradient(top, #f0ad4e 0%, #ec971f 100%); 344 | background-image: -webkit-gradient(linear, left top, left bottom, from(#f0ad4e), to(#ec971f)); 345 | background-image: linear-gradient(to bottom, #f0ad4e 0%, #ec971f 100%); 346 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff0ad4e', endColorstr='#ffec971f', GradientType=0); 347 | background-repeat: repeat-x; 348 | } 349 | .progress-bar-danger { 350 | background-image: -webkit-linear-gradient(top, #d9534f 0%, #c9302c 100%); 351 | background-image: -o-linear-gradient(top, #d9534f 0%, #c9302c 100%); 352 | background-image: -webkit-gradient(linear, left top, left bottom, from(#d9534f), to(#c9302c)); 353 | background-image: linear-gradient(to bottom, #d9534f 0%, #c9302c 100%); 354 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9534f', endColorstr='#ffc9302c', GradientType=0); 355 | background-repeat: repeat-x; 356 | } 357 | .progress-bar-striped { 358 | background-image: -webkit-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); 359 | background-image: -o-linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); 360 | background-image: linear-gradient(45deg, rgba(255, 255, 255, .15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, .15) 50%, rgba(255, 255, 255, .15) 75%, transparent 75%, transparent); 361 | } 362 | .list-group { 363 | border-radius: 4px; 364 | -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .075); 365 | box-shadow: 0 1px 2px rgba(0, 0, 0, .075); 366 | } 367 | .list-group-item.active, 368 | .list-group-item.active:hover, 369 | .list-group-item.active:focus { 370 | text-shadow: 0 -1px 0 #3071a9; 371 | background-image: -webkit-linear-gradient(top, #428bca 0%, #3278b3 100%); 372 | background-image: -o-linear-gradient(top, #428bca 0%, #3278b3 100%); 373 | background-image: -webkit-gradient(linear, left top, left bottom, from(#428bca), to(#3278b3)); 374 | background-image: linear-gradient(to bottom, #428bca 0%, #3278b3 100%); 375 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff3278b3', GradientType=0); 376 | background-repeat: repeat-x; 377 | border-color: #3278b3; 378 | } 379 | .panel { 380 | -webkit-box-shadow: 0 1px 2px rgba(0, 0, 0, .05); 381 | box-shadow: 0 1px 2px rgba(0, 0, 0, .05); 382 | } 383 | .panel-default > .panel-heading { 384 | background-image: -webkit-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%); 385 | background-image: -o-linear-gradient(top, #f5f5f5 0%, #e8e8e8 100%); 386 | background-image: -webkit-gradient(linear, left top, left bottom, from(#f5f5f5), to(#e8e8e8)); 387 | background-image: linear-gradient(to bottom, #f5f5f5 0%, #e8e8e8 100%); 388 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff5f5f5', endColorstr='#ffe8e8e8', GradientType=0); 389 | background-repeat: repeat-x; 390 | } 391 | .panel-primary > .panel-heading { 392 | background-image: -webkit-linear-gradient(top, #428bca 0%, #357ebd 100%); 393 | background-image: -o-linear-gradient(top, #428bca 0%, #357ebd 100%); 394 | background-image: -webkit-gradient(linear, left top, left bottom, from(#428bca), to(#357ebd)); 395 | background-image: linear-gradient(to bottom, #428bca 0%, #357ebd 100%); 396 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff428bca', endColorstr='#ff357ebd', GradientType=0); 397 | background-repeat: repeat-x; 398 | } 399 | .panel-success > .panel-heading { 400 | background-image: -webkit-linear-gradient(top, #dff0d8 0%, #d0e9c6 100%); 401 | background-image: -o-linear-gradient(top, #dff0d8 0%, #d0e9c6 100%); 402 | background-image: -webkit-gradient(linear, left top, left bottom, from(#dff0d8), to(#d0e9c6)); 403 | background-image: linear-gradient(to bottom, #dff0d8 0%, #d0e9c6 100%); 404 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffdff0d8', endColorstr='#ffd0e9c6', GradientType=0); 405 | background-repeat: repeat-x; 406 | } 407 | .panel-info > .panel-heading { 408 | background-image: -webkit-linear-gradient(top, #d9edf7 0%, #c4e3f3 100%); 409 | background-image: -o-linear-gradient(top, #d9edf7 0%, #c4e3f3 100%); 410 | background-image: -webkit-gradient(linear, left top, left bottom, from(#d9edf7), to(#c4e3f3)); 411 | background-image: linear-gradient(to bottom, #d9edf7 0%, #c4e3f3 100%); 412 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffd9edf7', endColorstr='#ffc4e3f3', GradientType=0); 413 | background-repeat: repeat-x; 414 | } 415 | .panel-warning > .panel-heading { 416 | background-image: -webkit-linear-gradient(top, #fcf8e3 0%, #faf2cc 100%); 417 | background-image: -o-linear-gradient(top, #fcf8e3 0%, #faf2cc 100%); 418 | background-image: -webkit-gradient(linear, left top, left bottom, from(#fcf8e3), to(#faf2cc)); 419 | background-image: linear-gradient(to bottom, #fcf8e3 0%, #faf2cc 100%); 420 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fffcf8e3', endColorstr='#fffaf2cc', GradientType=0); 421 | background-repeat: repeat-x; 422 | } 423 | .panel-danger > .panel-heading { 424 | background-image: -webkit-linear-gradient(top, #f2dede 0%, #ebcccc 100%); 425 | background-image: -o-linear-gradient(top, #f2dede 0%, #ebcccc 100%); 426 | background-image: -webkit-gradient(linear, left top, left bottom, from(#f2dede), to(#ebcccc)); 427 | background-image: linear-gradient(to bottom, #f2dede 0%, #ebcccc 100%); 428 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#fff2dede', endColorstr='#ffebcccc', GradientType=0); 429 | background-repeat: repeat-x; 430 | } 431 | .well { 432 | background-image: -webkit-linear-gradient(top, #e8e8e8 0%, #f5f5f5 100%); 433 | background-image: -o-linear-gradient(top, #e8e8e8 0%, #f5f5f5 100%); 434 | background-image: -webkit-gradient(linear, left top, left bottom, from(#e8e8e8), to(#f5f5f5)); 435 | background-image: linear-gradient(to bottom, #e8e8e8 0%, #f5f5f5 100%); 436 | filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffe8e8e8', endColorstr='#fff5f5f5', GradientType=0); 437 | background-repeat: repeat-x; 438 | border-color: #dcdcdc; 439 | -webkit-box-shadow: inset 0 1px 3px rgba(0, 0, 0, .05), 0 1px 0 rgba(255, 255, 255, .1); 440 | box-shadow: inset 0 1px 3px rgba(0, 0, 0, .05), 0 1px 0 rgba(255, 255, 255, .1); 441 | } 442 | /*# sourceMappingURL=bootstrap-theme.css.map */ 443 | -------------------------------------------------------------------------------- /assets/css/bootstrap-theme.css.map: -------------------------------------------------------------------------------- 1 | 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Load core variables and mixins\n// --------------------------------------------------\n\n@import \"variables.less\";\n@import \"mixins.less\";\n\n\n\n//\n// Buttons\n// --------------------------------------------------\n\n// Common styles\n.btn-default,\n.btn-primary,\n.btn-success,\n.btn-info,\n.btn-warning,\n.btn-danger {\n text-shadow: 0 -1px 0 rgba(0,0,0,.2);\n @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 1px rgba(0,0,0,.075);\n .box-shadow(@shadow);\n\n // Reset the shadow\n &:active,\n &.active {\n .box-shadow(inset 0 3px 5px rgba(0,0,0,.125));\n }\n}\n\n// Mixin for generating new styles\n.btn-styles(@btn-color: #555) {\n #gradient > .vertical(@start-color: @btn-color; @end-color: darken(@btn-color, 12%));\n .reset-filter(); // Disable gradients for IE9 because filter bleeds through rounded corners\n background-repeat: repeat-x;\n border-color: darken(@btn-color, 14%);\n\n &:hover,\n &:focus {\n background-color: darken(@btn-color, 12%);\n background-position: 0 -15px;\n }\n\n &:active,\n &.active {\n background-color: darken(@btn-color, 12%);\n border-color: darken(@btn-color, 14%);\n }\n\n &:disabled,\n &[disabled] {\n background-color: darken(@btn-color, 12%);\n background-image: none;\n }\n}\n\n// Common styles\n.btn {\n // Remove the gradient for the pressed/active state\n &:active,\n &.active {\n background-image: none;\n }\n}\n\n// Apply the mixin to the buttons\n.btn-default { .btn-styles(@btn-default-bg); text-shadow: 0 1px 0 #fff; border-color: #ccc; }\n.btn-primary { .btn-styles(@btn-primary-bg); }\n.btn-success { .btn-styles(@btn-success-bg); }\n.btn-info { .btn-styles(@btn-info-bg); }\n.btn-warning { .btn-styles(@btn-warning-bg); }\n.btn-danger { .btn-styles(@btn-danger-bg); }\n\n\n\n//\n// Images\n// --------------------------------------------------\n\n.thumbnail,\n.img-thumbnail {\n .box-shadow(0 1px 2px rgba(0,0,0,.075));\n}\n\n\n\n//\n// Dropdowns\n// --------------------------------------------------\n\n.dropdown-menu > li > a:hover,\n.dropdown-menu > li > a:focus {\n #gradient > .vertical(@start-color: @dropdown-link-hover-bg; @end-color: darken(@dropdown-link-hover-bg, 5%));\n background-color: darken(@dropdown-link-hover-bg, 5%);\n}\n.dropdown-menu > .active > a,\n.dropdown-menu > .active > a:hover,\n.dropdown-menu > .active > a:focus {\n #gradient > .vertical(@start-color: @dropdown-link-active-bg; @end-color: darken(@dropdown-link-active-bg, 5%));\n background-color: darken(@dropdown-link-active-bg, 5%);\n}\n\n\n\n//\n// Navbar\n// --------------------------------------------------\n\n// Default navbar\n.navbar-default {\n #gradient > .vertical(@start-color: lighten(@navbar-default-bg, 10%); @end-color: @navbar-default-bg);\n .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered\n border-radius: @navbar-border-radius;\n @shadow: inset 0 1px 0 rgba(255,255,255,.15), 0 1px 5px rgba(0,0,0,.075);\n .box-shadow(@shadow);\n\n .navbar-nav > .active > a {\n #gradient > .vertical(@start-color: darken(@navbar-default-bg, 5%); @end-color: darken(@navbar-default-bg, 2%));\n .box-shadow(inset 0 3px 9px rgba(0,0,0,.075));\n }\n}\n.navbar-brand,\n.navbar-nav > li > a {\n text-shadow: 0 1px 0 rgba(255,255,255,.25);\n}\n\n// Inverted navbar\n.navbar-inverse {\n #gradient > .vertical(@start-color: lighten(@navbar-inverse-bg, 10%); @end-color: @navbar-inverse-bg);\n .reset-filter(); // Remove gradient in IE<10 to fix bug where dropdowns don't get triggered\n\n .navbar-nav > .active > a {\n #gradient > .vertical(@start-color: @navbar-inverse-bg; @end-color: lighten(@navbar-inverse-bg, 2.5%));\n .box-shadow(inset 0 3px 9px rgba(0,0,0,.25));\n }\n\n .navbar-brand,\n .navbar-nav > li > a {\n text-shadow: 0 -1px 0 rgba(0,0,0,.25);\n }\n}\n\n// Undo rounded corners in static and fixed navbars\n.navbar-static-top,\n.navbar-fixed-top,\n.navbar-fixed-bottom {\n border-radius: 0;\n}\n\n\n\n//\n// Alerts\n// --------------------------------------------------\n\n// Common styles\n.alert {\n text-shadow: 0 1px 0 rgba(255,255,255,.2);\n @shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 1px 2px rgba(0,0,0,.05);\n .box-shadow(@shadow);\n}\n\n// Mixin for generating new styles\n.alert-styles(@color) {\n #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 7.5%));\n border-color: darken(@color, 15%);\n}\n\n// Apply the mixin to the alerts\n.alert-success { .alert-styles(@alert-success-bg); }\n.alert-info { .alert-styles(@alert-info-bg); }\n.alert-warning { .alert-styles(@alert-warning-bg); }\n.alert-danger { .alert-styles(@alert-danger-bg); }\n\n\n\n//\n// Progress bars\n// --------------------------------------------------\n\n// Give the progress background some depth\n.progress {\n #gradient > .vertical(@start-color: darken(@progress-bg, 4%); @end-color: @progress-bg)\n}\n\n// Mixin for generating new styles\n.progress-bar-styles(@color) {\n #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 10%));\n}\n\n// Apply the mixin to the progress bars\n.progress-bar { .progress-bar-styles(@progress-bar-bg); }\n.progress-bar-success { .progress-bar-styles(@progress-bar-success-bg); }\n.progress-bar-info { .progress-bar-styles(@progress-bar-info-bg); }\n.progress-bar-warning { .progress-bar-styles(@progress-bar-warning-bg); }\n.progress-bar-danger { .progress-bar-styles(@progress-bar-danger-bg); }\n\n// Reset the striped class because our mixins don't do multiple gradients and\n// the above custom styles override the new `.progress-bar-striped` in v3.2.0.\n.progress-bar-striped {\n #gradient > .striped();\n}\n\n\n//\n// List groups\n// --------------------------------------------------\n\n.list-group {\n border-radius: @border-radius-base;\n .box-shadow(0 1px 2px rgba(0,0,0,.075));\n}\n.list-group-item.active,\n.list-group-item.active:hover,\n.list-group-item.active:focus {\n text-shadow: 0 -1px 0 darken(@list-group-active-bg, 10%);\n #gradient > .vertical(@start-color: @list-group-active-bg; @end-color: darken(@list-group-active-bg, 7.5%));\n border-color: darken(@list-group-active-border, 7.5%);\n}\n\n\n\n//\n// Panels\n// --------------------------------------------------\n\n// Common styles\n.panel {\n .box-shadow(0 1px 2px rgba(0,0,0,.05));\n}\n\n// Mixin for generating new styles\n.panel-heading-styles(@color) {\n #gradient > .vertical(@start-color: @color; @end-color: darken(@color, 5%));\n}\n\n// Apply the mixin to the panel headings only\n.panel-default > .panel-heading { .panel-heading-styles(@panel-default-heading-bg); }\n.panel-primary > .panel-heading { .panel-heading-styles(@panel-primary-heading-bg); }\n.panel-success > .panel-heading { .panel-heading-styles(@panel-success-heading-bg); }\n.panel-info > .panel-heading { .panel-heading-styles(@panel-info-heading-bg); }\n.panel-warning > .panel-heading { .panel-heading-styles(@panel-warning-heading-bg); }\n.panel-danger > .panel-heading { .panel-heading-styles(@panel-danger-heading-bg); }\n\n\n\n//\n// Wells\n// --------------------------------------------------\n\n.well {\n #gradient > .vertical(@start-color: darken(@well-bg, 5%); @end-color: @well-bg);\n border-color: darken(@well-bg, 10%);\n @shadow: inset 0 1px 3px rgba(0,0,0,.05), 0 1px 0 rgba(255,255,255,.1);\n .box-shadow(@shadow);\n}\n","// Vendor Prefixes\n//\n// All vendor mixins are deprecated as of v3.2.0 due to the introduction of\n// Autoprefixer in our Gruntfile. They will be removed in v4.\n\n// - Animations\n// - Backface visibility\n// - Box shadow\n// - Box sizing\n// - Content columns\n// - Hyphens\n// - Placeholder text\n// - Transformations\n// - Transitions\n// - User Select\n\n\n// Animations\n.animation(@animation) {\n -webkit-animation: @animation;\n -o-animation: @animation;\n animation: @animation;\n}\n.animation-name(@name) {\n -webkit-animation-name: @name;\n animation-name: @name;\n}\n.animation-duration(@duration) {\n -webkit-animation-duration: @duration;\n animation-duration: @duration;\n}\n.animation-timing-function(@timing-function) {\n -webkit-animation-timing-function: @timing-function;\n animation-timing-function: @timing-function;\n}\n.animation-delay(@delay) {\n -webkit-animation-delay: @delay;\n animation-delay: @delay;\n}\n.animation-iteration-count(@iteration-count) {\n -webkit-animation-iteration-count: @iteration-count;\n animation-iteration-count: @iteration-count;\n}\n.animation-direction(@direction) {\n -webkit-animation-direction: @direction;\n animation-direction: @direction;\n}\n.animation-fill-mode(@fill-mode) {\n -webkit-animation-fill-mode: @fill-mode;\n animation-fill-mode: @fill-mode;\n}\n\n// Backface visibility\n// Prevent browsers from flickering when using CSS 3D transforms.\n// Default value is `visible`, but can be changed to `hidden`\n\n.backface-visibility(@visibility){\n -webkit-backface-visibility: @visibility;\n -moz-backface-visibility: @visibility;\n backface-visibility: @visibility;\n}\n\n// Drop shadows\n//\n// Note: Deprecated `.box-shadow()` as of v3.1.0 since all of Bootstrap's\n// supported browsers that have box shadow capabilities now support it.\n\n.box-shadow(@shadow) {\n -webkit-box-shadow: @shadow; // iOS <4.3 & Android <4.1\n box-shadow: @shadow;\n}\n\n// Box sizing\n.box-sizing(@boxmodel) {\n -webkit-box-sizing: @boxmodel;\n -moz-box-sizing: @boxmodel;\n box-sizing: @boxmodel;\n}\n\n// CSS3 Content Columns\n.content-columns(@column-count; @column-gap: @grid-gutter-width) {\n -webkit-column-count: @column-count;\n -moz-column-count: @column-count;\n column-count: @column-count;\n -webkit-column-gap: @column-gap;\n -moz-column-gap: @column-gap;\n column-gap: @column-gap;\n}\n\n// Optional hyphenation\n.hyphens(@mode: auto) {\n word-wrap: break-word;\n -webkit-hyphens: @mode;\n -moz-hyphens: @mode;\n -ms-hyphens: @mode; // IE10+\n -o-hyphens: @mode;\n hyphens: @mode;\n}\n\n// Placeholder text\n.placeholder(@color: @input-color-placeholder) {\n &::-moz-placeholder { color: @color; // Firefox\n opacity: 1; } // See https://github.com/twbs/bootstrap/pull/11526\n &:-ms-input-placeholder { color: @color; } // Internet Explorer 10+\n &::-webkit-input-placeholder { color: @color; } // Safari and Chrome\n}\n\n// Transformations\n.scale(@ratio) {\n -webkit-transform: scale(@ratio);\n -ms-transform: scale(@ratio); // IE9 only\n -o-transform: scale(@ratio);\n transform: scale(@ratio);\n}\n.scale(@ratioX; @ratioY) {\n -webkit-transform: scale(@ratioX, @ratioY);\n -ms-transform: scale(@ratioX, @ratioY); // IE9 only\n -o-transform: scale(@ratioX, @ratioY);\n transform: scale(@ratioX, @ratioY);\n}\n.scaleX(@ratio) {\n -webkit-transform: scaleX(@ratio);\n -ms-transform: scaleX(@ratio); // IE9 only\n -o-transform: scaleX(@ratio);\n transform: scaleX(@ratio);\n}\n.scaleY(@ratio) {\n -webkit-transform: scaleY(@ratio);\n -ms-transform: scaleY(@ratio); // IE9 only\n -o-transform: scaleY(@ratio);\n transform: scaleY(@ratio);\n}\n.skew(@x; @y) {\n -webkit-transform: skewX(@x) skewY(@y);\n -ms-transform: skewX(@x) skewY(@y); // See https://github.com/twbs/bootstrap/issues/4885; IE9+\n -o-transform: skewX(@x) skewY(@y);\n transform: skewX(@x) skewY(@y);\n}\n.translate(@x; @y) {\n -webkit-transform: translate(@x, @y);\n -ms-transform: translate(@x, @y); // IE9 only\n -o-transform: translate(@x, @y);\n transform: translate(@x, @y);\n}\n.translate3d(@x; @y; @z) {\n -webkit-transform: translate3d(@x, @y, @z);\n transform: translate3d(@x, @y, @z);\n}\n.rotate(@degrees) {\n -webkit-transform: rotate(@degrees);\n -ms-transform: rotate(@degrees); // IE9 only\n -o-transform: rotate(@degrees);\n transform: rotate(@degrees);\n}\n.rotateX(@degrees) {\n -webkit-transform: rotateX(@degrees);\n -ms-transform: rotateX(@degrees); // IE9 only\n -o-transform: rotateX(@degrees);\n transform: rotateX(@degrees);\n}\n.rotateY(@degrees) {\n -webkit-transform: rotateY(@degrees);\n -ms-transform: rotateY(@degrees); // IE9 only\n -o-transform: rotateY(@degrees);\n transform: rotateY(@degrees);\n}\n.perspective(@perspective) {\n -webkit-perspective: @perspective;\n -moz-perspective: @perspective;\n perspective: @perspective;\n}\n.perspective-origin(@perspective) {\n -webkit-perspective-origin: @perspective;\n -moz-perspective-origin: @perspective;\n perspective-origin: @perspective;\n}\n.transform-origin(@origin) {\n -webkit-transform-origin: @origin;\n -moz-transform-origin: @origin;\n -ms-transform-origin: @origin; // IE9 only\n transform-origin: @origin;\n}\n\n\n// Transitions\n\n.transition(@transition) {\n -webkit-transition: @transition;\n -o-transition: @transition;\n transition: @transition;\n}\n.transition-property(@transition-property) {\n -webkit-transition-property: @transition-property;\n transition-property: @transition-property;\n}\n.transition-delay(@transition-delay) {\n -webkit-transition-delay: @transition-delay;\n transition-delay: @transition-delay;\n}\n.transition-duration(@transition-duration) {\n -webkit-transition-duration: @transition-duration;\n transition-duration: @transition-duration;\n}\n.transition-timing-function(@timing-function) {\n -webkit-transition-timing-function: @timing-function;\n transition-timing-function: @timing-function;\n}\n.transition-transform(@transition) {\n -webkit-transition: -webkit-transform @transition;\n -moz-transition: -moz-transform @transition;\n -o-transition: -o-transform @transition;\n transition: transform @transition;\n}\n\n\n// User select\n// For selecting text on the page\n\n.user-select(@select) {\n -webkit-user-select: @select;\n -moz-user-select: @select;\n -ms-user-select: @select; // IE10+\n user-select: @select;\n}\n",null,"// Gradients\n\n#gradient {\n\n // Horizontal gradient, from left to right\n //\n // Creates two color stops, start and end, by specifying a color and position for each color stop.\n // Color stops are not available in IE9 and below.\n .horizontal(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {\n background-image: -webkit-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Safari 5.1-6, Chrome 10+\n background-image: -o-linear-gradient(left, @start-color @start-percent, @end-color @end-percent); // Opera 12\n background-image: linear-gradient(to right, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+\n background-repeat: repeat-x;\n filter: e(%(\"progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)\",argb(@start-color),argb(@end-color))); // IE9 and down\n }\n\n // Vertical gradient, from top to bottom\n //\n // Creates two color stops, start and end, by specifying a color and position for each color stop.\n // Color stops are not available in IE9 and below.\n .vertical(@start-color: #555; @end-color: #333; @start-percent: 0%; @end-percent: 100%) {\n background-image: -webkit-linear-gradient(top, @start-color @start-percent, @end-color @end-percent); // Safari 5.1-6, Chrome 10+\n background-image: -o-linear-gradient(top, @start-color @start-percent, @end-color @end-percent); // Opera 12\n background-image: linear-gradient(to bottom, @start-color @start-percent, @end-color @end-percent); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+\n background-repeat: repeat-x;\n filter: e(%(\"progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)\",argb(@start-color),argb(@end-color))); // IE9 and down\n }\n\n .directional(@start-color: #555; @end-color: #333; @deg: 45deg) {\n background-repeat: repeat-x;\n background-image: -webkit-linear-gradient(@deg, @start-color, @end-color); // Safari 5.1-6, Chrome 10+\n background-image: -o-linear-gradient(@deg, @start-color, @end-color); // Opera 12\n background-image: linear-gradient(@deg, @start-color, @end-color); // Standard, IE10, Firefox 16+, Opera 12.10+, Safari 7+, Chrome 26+\n }\n .horizontal-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {\n background-image: -webkit-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);\n background-image: -o-linear-gradient(left, @start-color, @mid-color @color-stop, @end-color);\n background-image: linear-gradient(to right, @start-color, @mid-color @color-stop, @end-color);\n background-repeat: no-repeat;\n filter: e(%(\"progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=1)\",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback\n }\n .vertical-three-colors(@start-color: #00b3ee; @mid-color: #7a43b6; @color-stop: 50%; @end-color: #c3325f) {\n background-image: -webkit-linear-gradient(@start-color, @mid-color @color-stop, @end-color);\n background-image: -o-linear-gradient(@start-color, @mid-color @color-stop, @end-color);\n background-image: linear-gradient(@start-color, @mid-color @color-stop, @end-color);\n background-repeat: no-repeat;\n filter: e(%(\"progid:DXImageTransform.Microsoft.gradient(startColorstr='%d', endColorstr='%d', GradientType=0)\",argb(@start-color),argb(@end-color))); // IE9 and down, gets no color-stop at all for proper fallback\n }\n .radial(@inner-color: #555; @outer-color: #333) {\n background-image: -webkit-radial-gradient(circle, @inner-color, @outer-color);\n background-image: radial-gradient(circle, @inner-color, @outer-color);\n background-repeat: no-repeat;\n }\n .striped(@color: rgba(255,255,255,.15); @angle: 45deg) {\n background-image: -webkit-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);\n background-image: -o-linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);\n background-image: linear-gradient(@angle, @color 25%, transparent 25%, transparent 50%, @color 50%, @color 75%, transparent 75%, transparent);\n }\n}\n","// Reset filters for IE\n//\n// When you need to remove a gradient background, do not forget to use this to reset\n// the IE filter for IE9 and below.\n\n.reset-filter() {\n filter: e(%(\"progid:DXImageTransform.Microsoft.gradient(enabled = false)\"));\n}\n"]} -------------------------------------------------------------------------------- /assets/css/bootstrap-theme.min.css: -------------------------------------------------------------------------------- 1 | /*! 2 | * Bootstrap v3.2.0 (http://getbootstrap.com) 3 | * Copyright 2011-2014 Twitter, Inc. 4 | * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) 5 | */.btn-default,.btn-primary,.btn-success,.btn-info,.btn-warning,.btn-danger{text-shadow:0 -1px 0 rgba(0,0,0,.2);-webkit-box-shadow:inset 0 1px 0 rgba(255,255,255,.15),0 1px 1px rgba(0,0,0,.075);box-shadow:inset 0 1px 0 rgba(255,255,255,.15),0 1px 1px rgba(0,0,0,.075)}.btn-default:active,.btn-primary:active,.btn-success:active,.btn-info:active,.btn-warning:active,.btn-danger:active,.btn-default.active,.btn-primary.active,.btn-success.active,.btn-info.active,.btn-warning.active,.btn-danger.active{-webkit-box-shadow:inset 0 3px 5px rgba(0,0,0,.125);box-shadow:inset 0 3px 5px 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/ / / 5 | __ / / __/ / ,< \ / / / / \__ \/ __/ / /| | / /_/ / / / /_/ / 6 | / /_/ / /___/ /| | / / /___/ /___ ___/ / /___/ ___ |/ _, _/ /___/ __ / 7 | \____/_____/_/ |_| /_/_____/_____/ /____/_____/_/ |_/_/ |_|\____/_/ /_/ 8 | 9 | Based on 10 | 11 | */ 12 | window.JekyllSearch = (function(window,document){ 13 | var searchInput = document.querySelector(".search"), 14 | jsonFile = "/search.json", 15 | jsonData = null, 16 | template = "{title}", 17 | searchResults = document.querySelector(".results"), 18 | searchResultsHeader = "", 19 | searchResultsFooter = "", 20 | limit = 10, 21 | fuzzy = false, 22 | noResults = "

Nothing matched your query

"; 23 | 24 | /* 25 | register the keydown event and load the json file 26 | */ 27 | function load(){ 28 | if( searchInput && searchResults ){ 29 | getJSON(); 30 | searchInput.addEventListener("keyup", search); 31 | }else{ 32 | console.log("couldn't find the searchInput or searchResults element"); 33 | } 34 | } 35 | 36 | /* 37 | Fetches the JSON file and populate the jsonData var 38 | */ 39 | function getJSON(){ 40 | var xhr = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP"); 41 | xhr.open("GET", jsonFile, true); 42 | xhr.onreadystatechange = function(){ 43 | if (xhr.status==200 && xhr.readyState==4){ 44 | try{ 45 | jsonData = JSON.parse( xhr.responseText ); 46 | console.log( "data loaded successfully" ); 47 | }catch(err){ 48 | console.log( err ); 49 | jsonData = null; 50 | } 51 | } 52 | } 53 | xhr.send(); 54 | } 55 | 56 | /* 57 | Perform a search on the keydown event 58 | e is passed from the event listener to determine which key the user pressed 59 | */ 60 | function search( e ){ 61 | if(e.which === 13 && matches && matches.length){ 62 | window.location = matches[0].url; 63 | }else{ 64 | if(jsonData){ 65 | writeMatches( getMatches( e.target.value ) ); 66 | }else{ 67 | console.log( "jsonData is not ready" ); 68 | } 69 | } 70 | } 71 | /* 72 | Get matches that satisfy the query 73 | */ 74 | function getMatches( query ){ 75 | if( query == "" ) return null; 76 | matches = []; 77 | for (var i = 0; i < jsonData.length; i++) { 78 | var obj = jsonData[i]; 79 | for (key in obj) { 80 | // Skip searching on the URL 81 | if( key == 'url' ) continue; 82 | if( fuzzy ){ 83 | var regexp = new RegExp( query.split('').join('.*?'), 'gi'); 84 | if( obj[key].match(regexp) ){ 85 | matches.push(obj); 86 | break; 87 | } 88 | }else if (obj.hasOwnProperty(key) && obj[key].toLowerCase().indexOf(query.toLowerCase()) >= 0){ 89 | matches.push(obj); 90 | break; 91 | } 92 | } 93 | } 94 | return matches; 95 | } 96 | 97 | /* 98 | Write out the matches 99 | */ 100 | function writeMatches( matches ){ 101 | if( matches ) { 102 | if ( matches.length ){ 103 | searchResults.innerHTML = searchResultsHeader; 104 | for (var i = 0; i < matches.length && i < limit; i++) { 105 | var match = matches[i]; 106 | var output = template.replace(/\{(.*?)\}/g, function(m, capturedGroup) { 107 | return match[ capturedGroup ]; 108 | }); 109 | searchResults.innerHTML += output; 110 | } 111 | footer = searchResultsFooter.replace(/\{limit\}/g,limit) 112 | footer = footer.replace(/\{total\}/g,matches.length) 113 | searchResults.innerHTML += footer; 114 | }else{ 115 | searchResults.innerHTML = noResults; 116 | } 117 | } else { 118 | searchResults.innerHTML = ""; 119 | } 120 | } 121 | 122 | return { 123 | init: function(options){ 124 | if( options ){ 125 | searchInput = options.searchInput || searchInput; 126 | jsonFile = options.jsonFile || jsonFile; 127 | template = options.template || template; 128 | searchResults = options.searchResults || searchResults; 129 | searchResultsHeader = options.searchResultsHeader || searchResultsHeader; 130 | searchResultsFooter = options.searchResultsFooter || searchResultsFooter; 131 | limit = options.limit || limit; 132 | fuzzy = options.fuzzy || fuzzy; 133 | noResults = options.noResults || noResults; 134 | } 135 | load(); 136 | } 137 | } 138 | })(window,document); 139 | -------------------------------------------------------------------------------- /assets/js/venn.js: -------------------------------------------------------------------------------- 1 | (function(venn) { 2 | "use strict"; 3 | /** given a list of set objects, and their corresponding overlaps. 4 | updates the (x, y, radius) attribute on each set such that their positions 5 | roughly correspond to the desired overlaps */ 6 | venn.venn = function(sets, overlaps, parameters) { 7 | parameters = parameters || {}; 8 | parameters.maxIterations = parameters.maxIterations || 500; 9 | var lossFunction = parameters.lossFunction || venn.lossFunction; 10 | var initialLayout = parameters.layoutFunction || venn.greedyLayout; 11 | 12 | // initial layout is done greedily 13 | sets = initialLayout(sets, overlaps); 14 | 15 | // transform x/y coordinates to a vector to optimize 16 | var initial = new Array(2*sets.length); 17 | for (var i = 0; i < sets.length; ++i) { 18 | initial[2 * i] = sets[i].x; 19 | initial[2 * i + 1] = sets[i].y; 20 | } 21 | 22 | // optimize initial layout from our loss function 23 | var totalFunctionCalls = 0; 24 | var solution = venn.fmin( 25 | function(values) { 26 | totalFunctionCalls += 1; 27 | var current = new Array(sets.length); 28 | for (var i = 0; i < sets.length; ++i) { 29 | current[i] = {x: values[2 * i], 30 | y: values[2 * i + 1], 31 | radius : sets[i].radius, 32 | size : sets[i].size}; 33 | } 34 | return lossFunction(current, overlaps); 35 | }, 36 | initial, 37 | parameters); 38 | 39 | // transform solution vector back to x/y points 40 | var positions = solution.solution; 41 | for (i = 0; i < sets.length; ++i) { 42 | sets[i].x = positions[2 * i]; 43 | sets[i].y = positions[2 * i + 1]; 44 | } 45 | 46 | return sets; 47 | }; 48 | 49 | /** Returns the distance necessary for two circles of radius r1 + r2 to 50 | have the overlap area 'overlap' */ 51 | venn.distanceFromIntersectArea = function(r1, r2, overlap) { 52 | // handle complete overlapped circles 53 | if (Math.min(r1, r2) * Math.min(r1,r2) * Math.PI <= overlap) { 54 | return Math.abs(r1 - r2); 55 | } 56 | 57 | return venn.bisect(function(distance) { 58 | return venn.circleOverlap(r1, r2, distance) - overlap; 59 | }, 0, r1 + r2); 60 | }; 61 | 62 | /// gets a matrix of euclidean distances between all sets in venn diagram 63 | venn.getDistanceMatrix = function(sets, overlaps) { 64 | // initialize an empty distance matrix between all the points 65 | var distances = []; 66 | for (var i = 0; i < sets.length; ++i) { 67 | distances.push([]); 68 | for (var j = 0; j < sets.length; ++j) { 69 | distances[i].push(0); 70 | } 71 | } 72 | 73 | // compute distances between all the points 74 | for (i = 0; i < overlaps.length; ++i) { 75 | var current = overlaps[i]; 76 | if (current.sets.length !== 2) { 77 | continue; 78 | } 79 | 80 | var left = current.sets[0], 81 | right = current.sets[1], 82 | r1 = Math.sqrt(sets[left].size / Math.PI), 83 | r2 = Math.sqrt(sets[right].size / Math.PI), 84 | distance = venn.distanceFromIntersectArea(r1, r2, current.size); 85 | distances[left][right] = distances[right][left] = distance; 86 | } 87 | return distances; 88 | }; 89 | 90 | /** Lays out a Venn diagram greedily, going from most overlapped sets to 91 | least overlapped, attempting to position each new set such that the 92 | overlapping areas to already positioned sets are basically right */ 93 | venn.greedyLayout = function(sets, overlaps) { 94 | // give each set a default position + radius 95 | var setOverlaps = {}; 96 | for (var i = 0; i < sets.length; ++i) { 97 | setOverlaps[i] = []; 98 | sets[i].radius = Math.sqrt(sets[i].size / Math.PI); 99 | sets[i].x = sets[i].y = 0; 100 | } 101 | 102 | // map each set to a list of all the other sets that overlap it 103 | for (i = 0; i < overlaps.length; ++i) { 104 | var current = overlaps[i]; 105 | if (current.sets.length !== 2) { 106 | continue; 107 | } 108 | 109 | var weight = (current.weight == null) ? 1.0 : current.weight; 110 | var left = current.sets[0], right = current.sets[1]; 111 | setOverlaps[left].push ({set:right, size:current.size, weight:weight}); 112 | setOverlaps[right].push({set:left, size:current.size, weight:weight}); 113 | } 114 | 115 | // get list of most overlapped sets 116 | var mostOverlapped = []; 117 | for (var set in setOverlaps) { 118 | if (setOverlaps.hasOwnProperty(set)) { 119 | var size = 0; 120 | for (i = 0; i < setOverlaps[set].length; ++i) { 121 | size += setOverlaps[set][i].size * setOverlaps[set][i].weight; 122 | } 123 | 124 | mostOverlapped.push({set: set, size:size}); 125 | } 126 | } 127 | 128 | // sort by size desc 129 | function sortOrder(a,b) { 130 | return b.size - a.size; 131 | } 132 | mostOverlapped.sort(sortOrder); 133 | 134 | // keep track of what sets have been laid out 135 | var positioned = {}; 136 | function isPositioned(element) { 137 | return element.set in positioned; 138 | } 139 | 140 | // adds a point to the output 141 | function positionSet(point, index) { 142 | sets[index].x = point.x; 143 | sets[index].y = point.y; 144 | positioned[index] = true; 145 | } 146 | 147 | // add most overlapped set at (0,0) 148 | positionSet({x: 0, y: 0}, mostOverlapped[0].set); 149 | 150 | // get distances between all points 151 | var distances = venn.getDistanceMatrix(sets, overlaps); 152 | 153 | for (i = 1; i < mostOverlapped.length; ++i) { 154 | var setIndex = mostOverlapped[i].set, 155 | overlap = setOverlaps[setIndex].filter(isPositioned); 156 | set = sets[setIndex]; 157 | overlap.sort(sortOrder); 158 | 159 | if (overlap.length === 0) { 160 | throw "Need overlap information for set " + JSON.stringify( set ); 161 | } 162 | 163 | var points = []; 164 | for (var j = 0; j < overlap.length; ++j) { 165 | // get appropriate distance from most overlapped already added set 166 | var p1 = sets[overlap[j].set], 167 | d1 = distances[setIndex][overlap[j].set]; 168 | 169 | // sample positions at 90 degrees for maximum aesthetics 170 | points.push({x : p1.x + d1, y : p1.y}); 171 | points.push({x : p1.x - d1, y : p1.y}); 172 | points.push({y : p1.y + d1, x : p1.x}); 173 | points.push({y : p1.y - d1, x : p1.x}); 174 | 175 | // if we have at least 2 overlaps, then figure out where the 176 | // set should be positioned analytically and try those too 177 | for (var k = j + 1; k < overlap.length; ++k) { 178 | var p2 = sets[overlap[k].set], 179 | d2 = distances[setIndex][overlap[k].set]; 180 | 181 | var extraPoints = venn.circleCircleIntersection( 182 | { x: p1.x, y: p1.y, radius: d1}, 183 | { x: p2.x, y: p2.y, radius: d2}); 184 | 185 | for (var l = 0; l < extraPoints.length; ++l) { 186 | points.push(extraPoints[l]); 187 | } 188 | } 189 | } 190 | 191 | // we have some candidate positions for the set, examine loss 192 | // at each position to figure out where to put it at 193 | var bestLoss = 1e50, bestPoint = points[0]; 194 | for (j = 0; j < points.length; ++j) { 195 | sets[setIndex].x = points[j].x; 196 | sets[setIndex].y = points[j].y; 197 | var loss = venn.lossFunction(sets, overlaps); 198 | if (loss < bestLoss) { 199 | bestLoss = loss; 200 | bestPoint = points[j]; 201 | } 202 | } 203 | 204 | positionSet(bestPoint, setIndex); 205 | } 206 | 207 | return sets; 208 | }; 209 | 210 | /// Uses multidimensional scaling to approximate a first layout here 211 | venn.classicMDSLayout = function(sets, overlaps) { 212 | // get the distance matrix 213 | var distances = venn.getDistanceMatrix(sets, overlaps); 214 | 215 | // get positions for each set 216 | var positions = mds.classic(distances); 217 | 218 | // translate back to (x,y,radius) coordinates 219 | for (var i = 0; i < sets.length; ++i) { 220 | sets[i].x = positions[i][0]; 221 | sets[i].y = positions[i][1]; 222 | sets[i].radius = Math.sqrt(sets[i].size / Math.PI); 223 | } 224 | return sets; 225 | }; 226 | 227 | /** Given a bunch of sets, and the desired overlaps between these sets - computes 228 | the distance from the actual overlaps to the desired overlaps. Note that 229 | this method ignores overlaps of more than 2 circles */ 230 | venn.lossFunction = function(sets, overlaps) { 231 | var output = 0; 232 | 233 | function getCircles(indices) { 234 | return indices.map(function(i) { return sets[i]; }); 235 | } 236 | 237 | for (var i = 0; i < overlaps.length; ++i) { 238 | var area = overlaps[i], overlap; 239 | if (area.sets.length == 2) { 240 | var left = sets[area.sets[0]], 241 | right = sets[area.sets[1]]; 242 | overlap = venn.circleOverlap(left.radius, right.radius, 243 | venn.distance(left, right)); 244 | } else { 245 | overlap = venn.intersectionArea(getCircles(area.sets)); 246 | } 247 | 248 | var weight = (area.weight == null) ? 1.0 : area.weight; 249 | output += weight * (overlap - area.size) * (overlap - area.size); 250 | } 251 | 252 | return output; 253 | }; 254 | 255 | /** Scales a solution from venn.venn or venn.greedyLayout such that it fits in 256 | a rectangle of width/height - with padding around the borders. also 257 | centers the diagram in the available space at the same time */ 258 | venn.scaleSolution = function(solution, width, height, padding) { 259 | var minMax = function(d) { 260 | var hi = Math.max.apply(null, solution.map( 261 | function(c) { return c[d] + c.radius; } )), 262 | lo = Math.min.apply(null, solution.map( 263 | function(c) { return c[d] - c.radius;} )); 264 | return {max:hi, min:lo}; 265 | }; 266 | 267 | width -= 2*padding; 268 | height -= 2*padding; 269 | 270 | var xRange = minMax('x'), 271 | yRange = minMax('y'), 272 | xScaling = width / (xRange.max - xRange.min), 273 | yScaling = height / (yRange.max - yRange.min), 274 | scaling = Math.min(yScaling, xScaling), 275 | 276 | // while we're at it, center the diagram too 277 | xOffset = (width - (xRange.max - xRange.min) * scaling) / 2, 278 | yOffset = (height - (yRange.max - yRange.min) * scaling) / 2; 279 | 280 | for (var i = 0; i < solution.length; ++i) { 281 | var set = solution[i]; 282 | set.radius = scaling * set.radius; 283 | set.x = padding + xOffset + (set.x - xRange.min) * scaling; 284 | set.y = padding + yOffset + (set.y - yRange.min) * scaling; 285 | } 286 | 287 | return solution; 288 | }; 289 | 290 | // sometimes text doesn't fit inside the circle, if thats the case lets wrap 291 | // the text here such that it fits 292 | // todo: looks like this might be merged into d3 ( 293 | // https://github.com/mbostock/d3/issues/1642), 294 | // also worth checking out is 295 | // http://engineering.findthebest.com/wrapping-axis-labels-in-d3-js/ 296 | // this seems to be one of those things that should be easy but isn't 297 | function wrapText() { 298 | var text = d3.select(this), 299 | data = text.datum(), 300 | width = data.radius, 301 | words = data.label.split(/\s+/).reverse(), 302 | maxLines = 3, 303 | minChars = (data.label.length + words.length) / maxLines, 304 | word = words.pop(), 305 | line = [word], 306 | joined, 307 | lineNumber = 0, 308 | lineHeight = 1.1, // ems 309 | tspan = text.text(null).append("tspan").text(word); 310 | 311 | while (word = words.pop()) { 312 | line.push(word); 313 | joined = line.join(" "); 314 | tspan.text(joined); 315 | if (joined.length > minChars && tspan.node().getComputedTextLength() > width) { 316 | line.pop(); 317 | tspan.text(line.join(" ")); 318 | line = [word]; 319 | tspan = text.append("tspan").text(word); 320 | lineNumber++; 321 | } 322 | } 323 | 324 | var initial = 0.35 - lineNumber * lineHeight / 2, 325 | x = Math.floor(data.textCenter.x), 326 | y = Math.floor(data.textCenter.y); 327 | 328 | text.selectAll("tspan") 329 | .attr("x", x) 330 | .attr("y", y) 331 | .attr("dy", function(d, i) { 332 | return (initial + i * lineHeight) + "em"; 333 | }); 334 | } 335 | 336 | function weightedSum(a, b) { 337 | var ret = new Array(a[1].length || 0); 338 | for (var j = 0; j < ret.length; ++j) { 339 | ret[j] = a[0] * a[1][j] + b[0] * b[1][j]; 340 | } 341 | return ret; 342 | } 343 | 344 | /** finds the zeros of a function, given two starting points (which must 345 | * have opposite signs */ 346 | venn.bisect = function(f, a, b, parameters) { 347 | parameters = parameters || {}; 348 | var maxIterations = parameters.maxIterations || 100, 349 | tolerance = parameters.tolerance || 1e-10, 350 | fA = f(a), 351 | fB = f(b), 352 | delta = b - a; 353 | 354 | if (fA * fB > 0) { 355 | throw "Initial bisect points must have opposite signs"; 356 | } 357 | 358 | if (fA === 0) return a; 359 | if (fB === 0) return b; 360 | 361 | for (var i = 0; i < maxIterations; ++i) { 362 | delta /= 2; 363 | var mid = a + delta, 364 | fMid = f(mid); 365 | 366 | if (fMid * fA >= 0) { 367 | a = mid; 368 | } 369 | 370 | if ((Math.abs(delta) < tolerance) || (fMid === 0)) { 371 | return mid; 372 | } 373 | } 374 | return a + delta; 375 | }; 376 | 377 | /** minimizes a function using the downhill simplex method */ 378 | venn.fmin = function(f, x0, parameters) { 379 | parameters = parameters || {}; 380 | 381 | var maxIterations = parameters.maxIterations || x0.length * 200, 382 | nonZeroDelta = parameters.nonZeroDelta || 1.1, 383 | zeroDelta = parameters.zeroDelta || 0.001, 384 | minErrorDelta = parameters.minErrorDelta || 1e-5, 385 | rho = parameters.rho || 1, 386 | chi = parameters.chi || 2, 387 | psi = parameters.psi || -0.5, 388 | sigma = parameters.sigma || 0.5, 389 | callback = parameters.callback; 390 | 391 | // initialize simplex. 392 | var N = x0.length, 393 | simplex = new Array(N + 1); 394 | simplex[0] = x0; 395 | simplex[0].fx = f(x0); 396 | for (var i = 0; i < N; ++i) { 397 | var point = x0.slice(); 398 | point[i] = point[i] ? point[i] * nonZeroDelta : zeroDelta; 399 | simplex[i+1] = point; 400 | simplex[i+1].fx = f(point); 401 | } 402 | 403 | var sortOrder = function(a, b) { return a.fx - b.fx; }; 404 | 405 | for (var iteration = 0; iteration < maxIterations; ++iteration) { 406 | simplex.sort(sortOrder); 407 | if (callback) { 408 | callback(simplex); 409 | } 410 | 411 | if (Math.abs(simplex[0].fx - simplex[N].fx) < minErrorDelta) { 412 | break; 413 | } 414 | 415 | // compute the centroid of all but the worst point in the simplex 416 | var centroid = new Array(N); 417 | for (i = 0; i < N; ++i) { 418 | centroid[i] = 0; 419 | for (var j = 0; j < N; ++j) { 420 | centroid[i] += simplex[j][i]; 421 | } 422 | centroid[i] /= N; 423 | } 424 | 425 | // reflect the worst point past the centroid and compute loss at reflected 426 | // point 427 | var worst = simplex[N]; 428 | var reflected = weightedSum([1+rho, centroid], [-rho, worst]); 429 | reflected.fx = f(reflected); 430 | 431 | var replacement = reflected; 432 | 433 | // if the reflected point is the best seen, then possibly expand 434 | if (reflected.fx <= simplex[0].fx) { 435 | var expanded = weightedSum([1+chi, centroid], [-chi, worst]); 436 | expanded.fx = f(expanded); 437 | if (expanded.fx < reflected.fx) { 438 | replacement = expanded; 439 | } 440 | } 441 | 442 | // if the reflected point is worse than the second worst, we need to 443 | // contract 444 | else if (reflected.fx >= simplex[N-1].fx) { 445 | var shouldReduce = false; 446 | var contracted; 447 | 448 | if (reflected.fx <= worst.fx) { 449 | // do an inside contraction 450 | contracted = weightedSum([1+psi, centroid], [-psi, worst]); 451 | contracted.fx = f(contracted); 452 | if (contracted.fx < worst.fx) { 453 | replacement = contracted; 454 | } else { 455 | shouldReduce = true; 456 | } 457 | } else { 458 | // do an outside contraction 459 | contracted = weightedSum([1-psi * rho, centroid], [psi*rho, worst]); 460 | contracted.fx = f(contracted); 461 | if (contracted.fx <= reflected.fx) { 462 | replacement = contracted; 463 | } else { 464 | shouldReduce = true; 465 | } 466 | } 467 | 468 | if (shouldReduce) { 469 | // do reduction. doesn't actually happen that often 470 | for (i = 1; i < simplex.length; ++i) { 471 | simplex[i] = weightedSum([1 - sigma, simplex[0]], 472 | [sigma - 1, simplex[i]]); 473 | simplex[i].fx = f(simplex[i]); 474 | } 475 | } 476 | } 477 | 478 | simplex[N] = replacement; 479 | } 480 | 481 | simplex.sort(sortOrder); 482 | return {f : simplex[0].fx, 483 | solution : simplex[0]}; 484 | }; 485 | 486 | /** returns a svg path of the intersection area of a bunch of circles */ 487 | venn.intersectionAreaPath = function(circles) { 488 | var stats = {}; 489 | venn.intersectionArea(circles, stats); 490 | var arcs = stats.arcs; 491 | 492 | if (arcs.length === 0) { 493 | return "M 0 0"; 494 | } 495 | 496 | var ret = ["\nM", arcs[0].p2.x, arcs[0].p2.y]; 497 | for (var i = 0; i < arcs.length; ++i) { 498 | var arc = arcs[i], r = arc.circle.radius, wide = arc.width > r; 499 | ret.push("\nA", r, r, 0, wide ? 1 : 0, 1, arc.p1.x, arc.p1.y); 500 | } 501 | 502 | return ret.join(" "); 503 | }; 504 | 505 | // computes the center for text by sampling perimiter of circle, and taking 506 | // the average of points on perimeter that are only in that circle 507 | function computeTextCenters(sets, width, height, diagram) { 508 | // basically just finding the center point of each region by sampling 509 | // points in a grid and taking the average sampled point for each region 510 | // There is probably an analytic way of computing this exactly, but 511 | // this works well enough for our purposes 512 | var sums = []; 513 | for (var i = 0; i < sets.length; ++i) { 514 | sums.push({'x' : 0, 'y' : 0, 'count' : 0}); 515 | } 516 | 517 | var samples = 32; 518 | for (var i = 0; i < samples; ++i) { 519 | var x = i * width / samples; 520 | for (var j = 0; j < samples; ++j) { 521 | var y = j * height / samples; 522 | var point = {'x' : x, 'y' : y}; 523 | 524 | var contained = [] 525 | 526 | for (var k = 0; k < sets.length; ++k) { 527 | if (venn.distance(point, sets[k]) <= sets[k].radius) { 528 | contained.push(k); 529 | } 530 | } 531 | if (contained.length == 1) { 532 | var sum = sums[contained[0]]; 533 | sum.x += point.x; 534 | sum.y += point.y; 535 | sum.count += 1; 536 | } 537 | } 538 | } 539 | 540 | for (var i = 0; i < sets.length; ++i) { 541 | var sum = sums[i]; 542 | if (sum.count) { 543 | sets[i].textCenter = { 'x' : sum.x / sum.count, 544 | 'y' : sum.y / sum.count}; 545 | } else { 546 | // no sampled points, possibly completely overlapped (or tiny) 547 | // use circle centre 548 | sets[i].textCenter = { 'x' : sets[i].x, 549 | 'y' : sets[i].y}; 550 | } 551 | } 552 | } 553 | 554 | venn.drawD3Diagram = function(element, dataset, width, height, parameters) { 555 | parameters = parameters || {}; 556 | 557 | var colours = d3.scale.category10(), 558 | padding = ('padding' in parameters) ? parameters.padding : 6; 559 | 560 | dataset = venn.scaleSolution(dataset, width, height, padding); 561 | computeTextCenters(dataset, width, height); 562 | 563 | var svg = element.append("svg") 564 | .attr("width", width) 565 | .attr("height", height); 566 | 567 | var diagram = svg.append( "g" ); 568 | 569 | var nodes = diagram.append("g").selectAll("circle") 570 | .data(dataset) 571 | .enter() 572 | .append("g"); 573 | 574 | var circles = nodes.append("circle") 575 | .attr("r", function(d) { return d.radius; }) 576 | .style("fill-opacity", 0.3) 577 | .attr("cx", function(d) { return d.x; }) 578 | .attr("cy", function(d) { return d.y; }) 579 | .style("fill", function(d, i) { return colours(i); }); 580 | 581 | var text = nodes.append("text") 582 | .attr("dy", ".35em") 583 | .attr("x", function(d) { return Math.floor(d.textCenter.x); }) 584 | .attr("y", function(d) { return Math.floor(d.textCenter.y); }) 585 | .attr("text-anchor", "middle") 586 | .style("fill", function(d, i) { return colours(i); }) 587 | .call(function (text) { text.each(wrapText); }); 588 | 589 | return {'svg' : svg, 590 | 'nodes' : nodes, 591 | 'circles' : circles, 592 | 'text' : text }; 593 | }; 594 | 595 | venn.updateD3Diagram = function(diagram, dataset, parameters) { 596 | parameters = parameters || {}; 597 | var padding = ('padding' in parameters) ? parameters.padding : 6, 598 | duration = ('duration' in parameters) ? parameters.duration : 400; 599 | 600 | var svg = diagram.svg, 601 | width = parseInt(svg.attr('width'), 10), 602 | height = parseInt(svg.attr('height'), 10); 603 | 604 | dataset = venn.scaleSolution(dataset, width, height, padding); 605 | computeTextCenters(dataset, width, height); 606 | 607 | var transition = diagram.nodes 608 | .data(dataset) 609 | .transition() 610 | .duration(duration); 611 | 612 | transition.select("circle") 613 | .attr("cx", function(d) { return d.x; }) 614 | .attr("cy", function(d) { return d.y; }) 615 | .attr("r", function(d) { return d.radius; }); 616 | 617 | // transtitioning the text is a little tricky in the case 618 | // of wrapping. so lets basically transition unwrapped text 619 | // and at the end of the transition we'll wrap it again 620 | transition.select("text") 621 | .text(function (d) { return d.label; } ) 622 | .each("end", wrapText) 623 | .attr("x", function(d) { return Math.floor(d.textCenter.x); }) 624 | .attr("y", function(d) { return Math.floor(d.textCenter.y); }); 625 | }; 626 | 627 | var SMALL = 1e-10; 628 | 629 | /** Returns the intersection area of a bunch of circles (where each circle 630 | is an object having an x,y and radius property) */ 631 | venn.intersectionArea = function(circles, stats) { 632 | // get all the intersection points of the circles 633 | var intersectionPoints = getIntersectionPoints(circles); 634 | 635 | // filter out points that aren't included in all the circles 636 | var innerPoints = intersectionPoints.filter(function (p) { 637 | return venn.containedInCircles(p, circles); 638 | }); 639 | 640 | var arcArea = 0, polygonArea = 0, arcs = [], i; 641 | 642 | // if we have intersection points that are within all the circles, 643 | // then figure out the area contained by them 644 | if (innerPoints.length > 1) { 645 | // sort the points by angle from the center of the polygon, which lets 646 | // us just iterate over points to get the edges 647 | var center = venn.getCenter(innerPoints); 648 | for (i = 0; i < innerPoints.length; ++i ) { 649 | var p = innerPoints[i]; 650 | p.angle = Math.atan2(p.x - center.x, p.y - center.y); 651 | } 652 | innerPoints.sort(function(a,b) { return b.angle - a.angle;}); 653 | 654 | // iterate over all points, get arc between the points 655 | // and update the areas 656 | var p2 = innerPoints[innerPoints.length - 1]; 657 | for (i = 0; i < innerPoints.length; ++i) { 658 | var p1 = innerPoints[i]; 659 | 660 | // polygon area updates easily ... 661 | polygonArea += (p2.x + p1.x) * (p1.y - p2.y); 662 | 663 | // updating the arc area is a little more involved 664 | var midPoint = {x : (p1.x + p2.x) / 2, 665 | y : (p1.y + p2.y) / 2}, 666 | arc = null; 667 | 668 | for (var j = 0; j < p1.parentIndex.length; ++j) { 669 | if (p2.parentIndex.indexOf(p1.parentIndex[j]) > -1) { 670 | // figure out the angle halfway between the two points 671 | // on the current circle 672 | var circle = circles[p1.parentIndex[j]], 673 | a1 = Math.atan2(p1.x - circle.x, p1.y - circle.y), 674 | a2 = Math.atan2(p2.x - circle.x, p2.y - circle.y); 675 | 676 | var angleDiff = (a2 - a1); 677 | if (angleDiff < 0) { 678 | angleDiff += 2*Math.PI; 679 | } 680 | 681 | // and use that angle to figure out the width of the 682 | // arc 683 | var a = a2 - angleDiff/2, 684 | width = venn.distance(midPoint, { 685 | x : circle.x + circle.radius * Math.sin(a), 686 | y : circle.y + circle.radius * Math.cos(a) 687 | }); 688 | 689 | // pick the circle whose arc has the smallest width 690 | if ((arc === null) || (arc.width > width)) { 691 | arc = { circle : circle, 692 | width : width, 693 | p1 : p1, 694 | p2 : p2}; 695 | } 696 | } 697 | } 698 | arcs.push(arc); 699 | arcArea += venn.circleArea(arc.circle.radius, arc.width); 700 | p2 = p1; 701 | } 702 | } else { 703 | // no intersection points, is either disjoint - or is completely 704 | // overlapped. figure out which by examining the smallest circle 705 | var smallest = circles[0]; 706 | for (i = 1; i < circles.length; ++i) { 707 | if (circles[i].radius < smallest.radius) { 708 | smallest = circles[i]; 709 | } 710 | } 711 | 712 | // make sure the smallest circle is completely contained in all 713 | // the other circles 714 | var disjoint = false; 715 | for (i = 0; i < circles.length; ++i) { 716 | if (venn.distance(circles[i], smallest) > Math.abs(smallest.radius - circles[i].radius)) { 717 | disjoint = true; 718 | break; 719 | } 720 | } 721 | 722 | if (disjoint) { 723 | arcArea = polygonArea = 0; 724 | 725 | } else { 726 | arcArea = smallest.radius * smallest.radius * Math.PI; 727 | arcs.push({circle : smallest, 728 | p1: { x: smallest.x, y : smallest.y + smallest.radius}, 729 | p2: { x: smallest.x - SMALL, y : smallest.y + smallest.radius}, 730 | width : smallest.radius * 2 }); 731 | } 732 | } 733 | 734 | polygonArea /= 2; 735 | if (stats) { 736 | stats.area = arcArea + polygonArea; 737 | stats.arcArea = arcArea; 738 | stats.polygonArea = polygonArea; 739 | stats.arcs = arcs; 740 | stats.innerPoints = innerPoints; 741 | stats.intersectionPoints = intersectionPoints; 742 | } 743 | 744 | return arcArea + polygonArea; 745 | }; 746 | 747 | /** returns whether a point is contained by all of a list of circles */ 748 | venn.containedInCircles = function(point, circles) { 749 | for (var i = 0; i < circles.length; ++i) { 750 | if (venn.distance(point, circles[i]) > circles[i].radius + SMALL) { 751 | return false; 752 | } 753 | } 754 | return true; 755 | }; 756 | 757 | /** Gets all intersection points between a bunch of circles */ 758 | function getIntersectionPoints(circles) { 759 | var ret = []; 760 | for (var i = 0; i < circles.length; ++i) { 761 | for (var j = i + 1; j < circles.length; ++j) { 762 | var intersect = venn.circleCircleIntersection(circles[i], 763 | circles[j]); 764 | for (var k = 0; k < intersect.length; ++k) { 765 | var p = intersect[k]; 766 | p.parentIndex = [i,j]; 767 | ret.push(p); 768 | } 769 | } 770 | } 771 | return ret; 772 | } 773 | 774 | venn.circleIntegral = function(r, x) { 775 | var y = Math.sqrt(r * r - x * x); 776 | return x * y + r * r * Math.atan2(x, y); 777 | }; 778 | 779 | /** Returns the area of a circle of radius r - up to width */ 780 | venn.circleArea = function(r, width) { 781 | return venn.circleIntegral(r, width - r) - venn.circleIntegral(r, -r); 782 | }; 783 | 784 | 785 | /** euclidean distance between two points */ 786 | venn.distance = function(p1, p2) { 787 | return Math.sqrt((p1.x - p2.x) * (p1.x - p2.x) + 788 | (p1.y - p2.y) * (p1.y - p2.y)); 789 | }; 790 | 791 | 792 | /** Returns the overlap area of two circles of radius r1 and r2 - that 793 | have their centers separated by distance d. Simpler faster 794 | circle intersection for only two circles */ 795 | venn.circleOverlap = function(r1, r2, d) { 796 | // no overlap 797 | if (d >= r1 + r2) { 798 | return 0; 799 | } 800 | 801 | // completely overlapped 802 | if (d <= Math.abs(r1 - r2)) { 803 | return Math.PI * Math.min(r1, r2) * Math.min(r1, r2); 804 | } 805 | 806 | var w1 = r1 - (d * d - r2 * r2 + r1 * r1) / (2 * d), 807 | w2 = r2 - (d * d - r1 * r1 + r2 * r2) / (2 * d); 808 | return venn.circleArea(r1, w1) + venn.circleArea(r2, w2); 809 | }; 810 | 811 | 812 | /** Given two circles (containing a x/y/radius attributes), 813 | returns the intersecting points if possible. 814 | note: doesn't handle cases where there are infinitely many 815 | intersection points (circles are equivalent):, or only one intersection point*/ 816 | venn.circleCircleIntersection = function(p1, p2) { 817 | var d = venn.distance(p1, p2), 818 | r1 = p1.radius, 819 | r2 = p2.radius; 820 | 821 | // if to far away, or self contained - can't be done 822 | if ((d >= (r1 + r2)) || (d <= Math.abs(r1 - r2))) { 823 | return []; 824 | } 825 | 826 | var a = (r1 * r1 - r2 * r2 + d * d) / (2 * d), 827 | h = Math.sqrt(r1 * r1 - a * a), 828 | x0 = p1.x + a * (p2.x - p1.x) / d, 829 | y0 = p1.y + a * (p2.y - p1.y) / d, 830 | rx = -(p2.y - p1.y) * (h / d), 831 | ry = -(p2.x - p1.x) * (h / d); 832 | 833 | return [{ x: x0 + rx, y : y0 - ry }, 834 | { x: x0 - rx, y : y0 + ry }]; 835 | }; 836 | 837 | /** Returns the center of a bunch of points */ 838 | venn.getCenter = function(points) { 839 | var center = { x: 0, y: 0}; 840 | for (var i =0; i < points.length; ++i ) { 841 | center.x += points[i].x; 842 | center.y += points[i].y; 843 | } 844 | center.x /= points.length; 845 | center.y /= points.length; 846 | return center; 847 | }; 848 | }(window.venn = window.venn || {})); 849 | -------------------------------------------------------------------------------- /icons/Karakterisering_Characterization_DigitalPreservation.png: 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purpose, and to encourage engagement with shared resources like format corpora and the Q&A site. 4 | 5 | ## Circulation 6 | 7 | - pasig-discuss@lists.stanford.edu 8 | - digital-preservation@jiscmail.ac.uk 9 | - dpc-discussion@jiscmail.ac.uk 10 | 11 | ## The Email 12 | 13 | __Subject:__ Digital Preservation Community Resources -- Request for feedback and call for contributions 14 | 15 | Calling All Digital Preservers! 16 | 17 | The digital preservation community is small and under resourced. This means we must work together if we want to make the biggest impact. To this end, a small group of us have been attempting to help the members of the digital preservation community better support each other. With World Digital Preservation Day just around the corner (), we'd like to encourage you all to (re)discover what we've built so far: 18 | 19 | * The homepage, our community gateway and homepage. 20 | * The _Digital Preservation Awesome List_ (), aiming to be a comprehensive index of software and resources to help preserve digital content. 21 | * The Digital Preservation Q&A site (), which is intended to make our questions and answers easier to find. 22 | * The File Formats Wiki 23 | * The Format Registry Aggregator (), which aggregates information from a number of different format registries so you can search across them all at once. 24 | * The Open Preservation Format Corpus (), where anyone can contribute example files. 25 | * The COPTR Tool Registry (), which was formed by the merger of many of the previous tool registry efforts, and which seeks to be a primary reference for those working in practical digital preservation. 26 | * The POWRR Tool Grid (), which is generated from COPTR Tool Registry. 27 | * The COPTR _Community Owned Workflows_ () 28 | * Digital Preservation and Data Curation Requirements and Solutions 29 | 30 | 31 | If you'd like to help, we'd love to hear from you.... 32 | 33 | * What have we missed from the [Awesome List](https://github.com/digipres/awesome-digital-preservation#readme)? 34 | * Can you answer any of [the unanswered DigiPres questions](http://qanda.digipres.org/unanswered)? Do you need to ask questions of your own? Are there old questions and answers on mailing lists that need a more visible home, so others can find them again? 35 | * Can you contribute to the [COPTR Tool Registry](http://coptr.digipres.org/)? 36 | * Are these resources useful? Should we change our approach? 37 | 38 | The last one is really important. We've been in digital preservation long enough to see a lot of portals and projects come and go, and we recognize that making it possible to build on past work sometimes requires changing what we've built so far. 39 | 40 | Please get in touch if you have any questions. You could talk us directly via Twitter or Mastodon (e.g. ), or use the [digipres.org discussion forums](https://github.com/orgs/digipres/discussions). We're happy to hear any and all ideas and criticisms! 41 | 42 | In particular, in the last few weeks, the digipres.org homepage has been modified and the Awesome List has been set up, based on community feedback (). Now would be a _great_ time to get some feedback on what we've been doing! 43 | 44 | Thanks for reading, and thanks to everyone who has contributed so far. 45 | 46 | 47 | Best wishes, 48 | 49 | Andy Jackson ([@anjacks0n](https://twitter.com/anjacks0n)/[@anj@digipres.club](https://digipres.club/@anj)) & Paul Wheatley ([@prwheatley](https://twitter.com/prwheatley)), on behalf of all the digipres.org contributors. 50 | 51 | With thanks to the [Open Preservation Foundation](https://openpreservation.org/) for hosting many of these resources, and to the [Digital Preservation Coalition](https://www.dpconline.org/) for their support. --------------------------------------------------------------------------------