Making Thesauri Work for the Semantic Web

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Making Thesauri Work for the Semantic Web
Alistair Miles Brian Matthews Michael Wilson
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Overview

• Introduction
• Thesaurus Interchange Format (TIF)
• Thesaurus Tools

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SWAD-Europe

• Semantic Web Advanced Development for Europe
• Research Development
• Demonstration Dissemination
• Partners
• CCLRC
• HP Labs
• ILRT
• ERCIM (INRIA)
• Stilo

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TIF for the Semantic Web

• RDF Schema
• Concept-based
• Extensible

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TIF Overview
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TIF Classes
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TIF Built-In Properties
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Concept-Relation
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Concept-Equivalence
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TIF Data
ltrdfRDF xmlns"http//www.w3c.rl.ac.uk/2003/07/2
2-tif" xmlnsdc"http//purl.org/dc/elements
/1.1/" xmlnsrdfhttp//www.w3.org/1999/02/22-rd
f-syntax-ns xmlbasehttp//www.rl.ac.uk/sophi
a/gt ltThesaurus rdfabout"GCL"gt
ltdctitlegtGovernment Category Listlt/dctitlegt
ltdcdescriptiongtList of categories used for
government metadata.lt/dcdescriptiongt
lt/Thesaurusgt ltTerm rdfabout"GCL?termA-leve
ls"gt ltvaluegtA-levelslt/valuegt
lt/Termgt ltConcept rdfabout"GCL?concept607"gt
ltcodegt607lt/codegt ltpreferred
rdfresource"GCL?termFirearms"/gt
ltnonPreferred rdfresource"GCL?termGun20licensi
ng"/gt ltnonPreferred rdfresource"GCL?term
Handguns"/gt ltbroader rdfresource"GCL?co
ncept564"/gt ltrelated rdfresource"GCL?co
ncept598"/gt ltrelated rdfresourceGCL?co
ncept827"/gt ltinexact rdfresource"GCL?co
ncept111"/gt ltpartial rdfresource"GCL?co
ncept222"/gt lt/Conceptgt lt/rdfRDFgt
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Term-Based Extension

• TIF-Simple

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TIF-S Built-In Properties
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Generating TIF-S from TIF

• TIF-S as derived relations
• Mapping rules
• Use Closed World Machine (CWM)

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TIF Summary

• RDF Schema
• Concept-based
• Mono- or Multi- lingual
• Extensible framework of properties
• Term-based extension (TIF-S)
• Exploit strengths of both models

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Thesaurus Tools

• Low-level
• Http server SophiaLite
• Java API Thes
• User-level
• Thesaurus browser SophiaMultilingua

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SophiaLite

• Http thesaurus server
• Http get parameters
• ?concept
• ?term
• ?data topconcepts / topterms / allconcepts
  / allterms
• Return RDF thesaurus data

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SophiaLite Architecture
Http Client
Http (params)
Http (RDQL)
Joseki
Joseki
Jdbc / http
RDF Store
RDF Files
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Thes Java API

• Link to UML
• Implementation

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SophiaMultilingua

• Thesaurus Viewer
• Demo
• Leverage SW tools for powerful lightweight apps

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Future Work

• Using OWL for validation and inference
• Thesaurus web service
• Publish datasets
• More user-level applications
• Use existing thesauri to enhance web experience
• Ontology migration

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Information

• Alistair Miles a.j.miles_at_rl.ac.uk
• TIF on the web
• http//www.w3c.rl.ac.uk/SWAD/thesaurus/tif/tif.htm
  l
• SWAD-Europe Thesaurus Activity
• http//www.w3c.rl.ac.uk/SWAD/thesaurus.html

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