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The Semantic History Extension for SMW. Jie Bao and Li Ding Rensselaer Polytechnic Institute 2009 Aug 6th. Motivation. The MediaWiki “recent changes” page and “history” tab Allows only very limited search of edits

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The Semantic History Extension for SMW

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The semantic history extension for smw l.jpg

The Semantic History Extension for SMW

Jie Bao and Li Ding

Rensselaer Polytechnic Institute

2009 Aug 6th


Motivation l.jpg

Motivation

The MediaWiki “recent changes” page and “history” tab

  • Allows only very limited search of edits

  • Does not capture the “semantics” of revision summary – e.g., “typo fix”, “add a source from CNN”

  • Does not provide triple-level changes

  • Can’t track temporal knowledge easily, e.g., Alice was Undergraduate in the spring but Ph.D. student in the summer.


The design l.jpg

The Design

User makes edits

The Semantic History (SH) extension captures edit actions

SH Generates “hidden pages” for revisions and triple changes.

A demo system http://tw.rpi.edu/semhis

  • Query

  • Statistics

  • Visualization

  • Explaination

SMW generates semantic annotations based on templates

Applications use semantic annotations

(can be customized)


Revision capture l.jpg

Revision Capture

A typical revision page

{{SH_Rev|3353|20090714211611|User:Baojie|Jin Guang Zheng}}

{{SH_UseTemplate|Template:Member of|2931}}

{{SH_Categories|PhD Student}}

Those pages are hidden from common users


Triple diff l.jpg

Triple Diff

  • A typical triple page

    {{SH_Triple|RPI|DefinedBy|Jie Bao}}

    {{SH_Add|1454|20090708190303|User:Baojie}}

    {{SH_Add|M20090708235158|20090708235158|User:Baojie}}

    {{SH_Delete|3305|20090713115342|User:Baojie}}

    {{SH_Obsolete|1}}


Semantic summary l.jpg

Semantic Summary

A revision page with semantic summary

{{SH_Rev|2462|20090712064807|User:Baojie|Main Page}}

{{SH_Summary|reason::to demo semantic summary; source::none; category:Test Edit; something not useful}}

{{SH_Minor}}

How to explain summary is up to the wiki admin (by designing “Template:SH_Summary”)


Usage examples l.jpg

Usage Examples


Provenance tracking l.jpg

Provenance tracking

Who has changed the first name of James Hendler?

http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_4


Query l.jpg

Query

Semantic Recent Change

http://tw.rpi.edu/proj/semhis.wiki/index.php/Semantic_recent_changes


Statistics l.jpg

Statistics

Which domain has attracted more changes: University or Person?

http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_5


Visualization l.jpg

Visualization

Edit trend from 2009-07-07 to 2009-07-13

http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_10


Temporal reasoning l.jpg

Temporal Reasoning

Which papers of Jie Bao are "Tetherelss World Publication"?

http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_8


Explanation l.jpg

Explanation

  • Step 1: the triple "Jie Bao Member_of ITA" is created at revision rev:2934, which does not directly generate this triple.

  • Step 2: rev:2934 uses template "Template:Member of" of revision 2931.

  • Step 3: rev:2931 may generate properties: member,member of

  • Thus, one possible explanation of "Jie Bao Member_of ITA" is the combination of rev:2934 to Jie Bao and rev:2931 to Template:Member of.

    The process is encoded by “Template:Explain”

Why Jie Bao is a member of the project ITA?

http://tw.rpi.edu/proj/semhis.wiki/index.php/Example_11


Conclusions l.jpg

Conclusions

  • “Semantic History” allows revision information in SMW to be represented in a semantic way.

  • Use SMW as database – semantic support built in and seamless integration with other SMW tools.

  • Customization by template, e.g., for vocabulary and semantic summary syntax

  • Allows many more applications than we demonstrated: trust computation, advanced explanation, revision as linked data, etc.

  • Will be released at http://www.mediawiki.org/wiki/Extension:SemanticHistory


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