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Purple MediaWiki: Fine-Grained Addressability of Wiki Content

Purple MediaWiki: Fine-Grained Addressability of Wiki Content. Ken Baclawski, Viral Gupta, Tejas Parikh Northeastern University Peter P. Yim, Jonathan Cheyer CIM Engineering. Motivation. Web content has evolved from small static pages to large, dynamically evolving documents.

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Purple MediaWiki: Fine-Grained Addressability of Wiki Content

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  1. Purple MediaWiki: Fine-Grained Addressability of Wiki Content Ken Baclawski, Viral Gupta, Tejas Parikh Northeastern University Peter P. Yim, Jonathan Cheyer CIM Engineering

  2. Motivation • Web content has evolved from small static pages to large, dynamically evolving documents. • Wikis foster large-scale, complex collaboration projects involving geographically distributed communities. • Fine-grained addressability of content has many uses • High-resolution hypertext links • More usable bookmarks • Inclusion of parts of documents in other documents • Annotation of specific parts of documents • Organizing discussions and negotiations

  3. Outline • Examples of fine-grained addressability • Introduction to Purple Numbers • Purple MediaWiki • Features • Architecture • Design • Related work • Plans for the future

  4. Examples of Fine-Grained Addressability • US Patents • Line numbers • Identifiers for elements of diagrams • Scientific research papers • Government and corporate archives • Standards documents

  5. History of Purple Numbers • Doug Engelbart’s oNLine System (NLS) in 1968: “Mother of All Demos” • “Precision browsing” added in the mid-1990s by Christina Engelbart • “Statement numbers” are now called “Purple Numbers” because of their color. • Frode Hegland introduced link information and made purple numbers active elements in 2000.

  6. Examples of Purple Numbers

  7. Successes • US Government standards development effort • 300 documents • 585 participants in 8 teams • 5 workshops • Completed development in 6 months • Ontolog Forum • Over 500 members from over 30 countries • Very widely used (more than 1.5M hits/month and 120K visits/month)

  8. Purple MediaWiki (PMWX) • Purple numbers for MediaWiki • Two kinds of purple number • Hierarchical identifier (HID) • Stateless/Dynamic • Regenerated as page is rendered • Node identifier (NID) • Stateful/Persistent • Permanently associated with each node • Viewspec: Hiding Purple Numbers

  9. Combining HIDs and NIDs

  10. PMWX in Action • http://project.cim3.net/wiki/PMWX

  11. PMWX System Architecture

  12. Reference Implementation • HIDs and NIDs use server-side PHP • Viewspec uses client-side JavaScript • Class diagram:

  13. Related Work • XLink, XPointer and XPath • Purple • Plink • PurpleSlurple • PurpleWiki • Purple numbering on blogs • HyperScope

  14. Future Work • Reference implementation of transclusion • Transclusion by HID and NID • Transclusion using XPath expressions • Migration from existing Purple Number wikis • Applications that build on Purple Numbers • Semantic wikis based on RDF and OWL • Fine-grained folksonomic tagging

  15. Conclusion • Fine-grained addressability is frequently used in many contexts, both traditional and online media. • There have been many successful applications of Purple Numbers. • Lack of integration with popular tools such as MediaWiki has limited the popularity of Purple Numbers. • Introducing fine-grained addressability to MediaWiki will make important capabilities available to a much larger number of collaborative project environments.

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