A Short Tutorial to Semantic Media Wiki (SMW) [[date:: July 21, 2009 ]] At [[part of:: Web Science...
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Transcript of A Short Tutorial to Semantic Media Wiki (SMW) [[date:: July 21, 2009 ]] At [[part of:: Web Science...
A Short Tutorial to Semantic Media Wiki (SMW)
[[date::July 21, 2009]]
At [[part of::Web Science Summer Research Week]]
By [[has speaker::Jie Bao]] and [[has speaker::Li Ding]]
[[Category:Tutorial]]
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• #1 What is SMW?
• #2 Editing
• #3 Browsing
• #4 Using Semantics
• #5 Example Apps
• #6 Additional Resources
Outline
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#1: What is SMW?
• An extension to MediaWiki – the wiki engine that powers Wikipedia
• Allows semantic annotation– Category: a group of things
• Student, Event, Talk
– Property: relation between two things• “A Short Tutorial to Semantic Media Wiki (SMW)” has speaker
“Jie Bao”• SummerProgram2009 costs $950
SMW is
• A wiki: simple, collaborative
• Semantic Web in the small
• A light-weight semantic database
• A platform to build other apps
• …
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Exercise Wiki
http://tw.rpi.edu/portal/SummerProgram2009
(please create an account and log in)
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#2: Editing
Create A New Page
• Click the “red links”
• How to get the red links?– Search “A new page” in search box, or– Add “[[A new page]]” on some existent page
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Non-semantic syntax
• Click “edit” tab to enter the editing page• Simple MediaWiki formatting syntax:
Headings of different levels ==heading==
===level 1===
Bullet list * first
* second
Numbered list # one
# two
Link to another page on the wiki
[[pagename]]
Link to another page on the wiki, but show different text
[[pagename|show_text]]
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Semantic Annotation Syntax
Description Syntax Example
Assign a page to a category
[[Category:categoryname]]
[[Category:Talk]]
Add a property (with value) to a page
[[propertyname::value]] [[date::July 21, 2009]]
Add a property (with value) to a page, but show “show_value”
[[propertyname::value|show_value]]
[[date::July 21, 2009|21st July]]
Categories and properties are also wiki pages• Category:Talk• Property:date
Advanced Topics(not covered here)
• Inline queries
• Semantic templates and forms
• Importing and exporting data
• Graphic user interface (Halo extension)
• Many more extensions…
More on http://semantic-mediawiki.org/wiki/Help:SMW_extensions
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Exercise
Write something about yourself:
http://tw.rpi.edu/portal/SummerProgram2009
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#3: Browsing
• Methods for browsing the regular wiki– Similar to browsing a website– Some links specific to the wiki
• “what links here” in the toolbox sidebar
• Methods for browsing the annotated data– Factbox– Property links to property pages– Category links to category pages– Semantic browsing
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Browsing - Track changes
• Track changes on the whole Wiki– use “Recent changes” in the navigation sidebar
• Track changes on one wiki page– use the “history” tab
• Track changes on pages related to one wiki page– Use the “Related changes” in the toolbox sidebar
• Track semantic changes of triples (an extension)– Example: http://tw.rpi.edu/semhis
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#4: Using Semantics
For End UsersImproved Semantic Data Generation
• Before– Use RDF syntax
– Use Editor
• After– From structured data
– Use SMW syntax
– Use Form
<?xml version="1.0"?><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"> <rdf:Description rdf:about="http://www.w3.org/"> <dc:title>World Wide Web Consortium</dc:title> </rdf:Description></rdf:RDF>
For End UsersSmart Data Propagation
• Data can be easily propagated via semantic query, e.g. the project and publications are included from others’ input
• Data can be propagated smartly using wiki-script based inference, e.g. “James A. Hendler” has an alias “Jim Hendler”
For Developers
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Wiki DB Triple Store Online dataData Layer
Map Data EvaluationPublication
Management
Still many not yet
mentioned…
Wiki Layer
App.Layer
(Semantic) Wiki Scripting
Semantic Template
Semantic Query
(PHP, Javascript) Wiki Extensions
HaloExtension
Parser Function
Concept Modeling: RDF, Relational Modeling, Rules
Semantic Forms
ProjectManagement
Remote SemWiki
Group Info. Management
SMW is a ready-to-use semantic web workbench
For DevelopersSMW Enables Fast Prototyping
• Learning Curve (before)– Web languages: HTML,
CSS– Semantic web languages:
RDF, RDFS, OWL, SPARQL,
– Web tools: web server (apache, tomcat), database (mysql), languages (PHP, Javascript)
– Semantic web tools: editor (protégé, swoop), triple store (sesame), ontology reasoners (pellet, racer), Programming API (jena),
• Learning Curve (after)– Wiki syntax – Semantic wiki syntax and
semantic form/template syntax
– Web tools hidden by Wiki– Simplified SW tools via
light-weight Wiki programming:
• Online authoring• Triple store• Semantic query with
simple RDFS reasoning
For DevelopersSMW is a Web-based modeling tool
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PersonNameRoleAliasAffiliation
Project
NameMember
IssueIDProjectAssignee
Jim Hendler ProfessorhasRole
Person
rdfs:subClassOf
Alice
John
hasUncleAlice
BobJohn
isParentOf
isBrotherOf
RDF Modeling
Relational Modeling
Rule Modeling
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#5: Example Apps
Publication Repository
21http://tw.rpi.edu/wiki/Publication
DBLP
bibtex
wiki markup
An Ontology Editor
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Template based OWL meta modeling with form support Controlled natural language rendering (Rabbit, ACE, Yayan) Limited rule inference to enhance the native RDFS inference
http://tw.rpi.edu/proj/cnl
RPI Campus Map
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#6 Additional Resources
• SMW site:http://semantic-mediawiki.org
• A 1.5 hour video tutorial: http://videolectures.net/eswc08_vrandecic_sw/
• SMW+ User Forum:http://smwforum.ontoprise.com/
• Tetherless World Work on SMWhttp://tw.rpi.edu/wiki/Semantic_Portal_Wiki
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