Isaac Talk UDC2007 Final

Information about Isaac Talk UDC2007 Final

Published on December 10, 2007

Author: Reva

Source: authorstream.com

Content

Aligning Thesauri for an integrated Access to Cultural Heritage Collections:  Aligning Thesauri for an integrated Access to Cultural Heritage Collections Antoine ISAAC (including slides by Frank van Harmelen) STITCH Project UDC Conference June 5th, 2007 Background:  Background CATCH Continuous Access To Cultural Heritage Funded by NWO 10 computer science research projects applied to the Cultural Heritage field STITCH SemanTic Interoperability To access Cultural Heritage Exchanging and integrating metadata Beware: this is research! Agenda:  Agenda The Semantic Interoperability problem Demo Semantic Web solutions for interoperability Conceptual vocabulary alignment Conceptual vocabulary representation KB Illustrated Manuscripts:  KB Illustrated Manuscripts KB Illustrated Manuscripts:  KB Illustrated Manuscripts BNF Mandragore:  BNF Mandragore BNF Mandragore:  BNF Mandragore The Semantic Interoperability Problem:  The Semantic Interoperability Problem Trend: simultaneous access to different collections Problem: conceptual heterogeneity No standard vocabulary/thesaurus “classical ruins” vs. “landscape with ruins” “the Virgin Mary” vs. “Saint Mary” We don’t really want it different vocabularies for different domains, traditions, tasks Practical consequence: Searching for “the Virgin Mary” misses “Saint Mary” Unless we know both vocabularies Old situation:  Old situation Vocabulary alignment:  Vocabulary alignment Find semantic correspondences between vocabulary elements “classical ruins” ≈ “landscape with ruins” “the Virgin Mary” = “Saint Mary” New situation:  New situation Demo:  Demo http://stitch.cs.vu.nl/rp33333/MANDRA-SV-ICE-mandraNewNONE , amphibians Wheat [Screenshots at the end of these slides] Agenda:  Agenda The Semantic Interoperability problem Demo Semantic Web solutions for interoperability Conceptual vocabulary alignment Conceptual vocabulary representation Vocabulary alignment:  Vocabulary alignment Find correspondences between vocabulary elements “klassieke ruïnes” ≈ “landschap met ruïnes” “maagd Maria” = “Heilige Moeder” STITCH aim: doing it (semi-)automatically Vocabularies are big They evolve over time Using techniques from Semantic Web research domain Problem comparable to ontology alignment Techniques already investigated there Linguistics, statistics Automatic alignment techniques:  Automatic alignment techniques Lexical Structural Statistical Background knowledge Lexical alignment:  Lexical alignment Labels of entities, textual definitions tumor brain Long tumor Long More specific than Automatic Alignment Techniques:  Automatic Alignment Techniques Lexical Structural Statistical Background knowledge Statistical alignment:  Statistical alignment Object information (e.g. book indexing) Statistical alignment: KB collections:  Statistical alignment: KB collections (4951 1152 613) Nederlands - Nederlandse taalkunde (280 714 243) Diabetes mellitus - suikerziekte Automatic Alignment Techniques:  Automatic Alignment Techniques Lexical Structural Statistical Background knowledge Alignment using shared background knowledge:  Alignment using shared background knowledge Using a shared conceptual reference to find links Alignment: no universal solution:  Alignment: no universal solution No single technique gives an ideal solution Different techniques have to be selected/combined, depending on the application case Poor vs. rich semantic structure Extensive vs. limited lexical coverage Existence of collections described by several vocabularies Alignment is a difficult research problem Agenda:  Agenda The Semantic Interoperability problem Demo Semantic Web solutions for interoperability Conceptual vocabulary alignment Conceptual vocabulary representation Representing Vocabularies:  Representing Vocabularies Many different models and formats to represent vocabularies Need for standard formats to develop standardized tools and methods Alignment process Browsing/information retrieval tools using vocabularies Need to represent features commonly used by these tools Especially lexical information and semantic links SKOS (Simple Knowledge Organisation System):  SKOS (Simple Knowledge Organisation System) World Wide Web Consortium (W3C) Model to represent simple conceptual vocabularies (thesauri, classification schemes) on the Semantic Web Comparable to Dublin Core, for conceptual vocabularies SKOS offers building blocks to create XML/RDF data Concepts and ConceptSchemes Lexical properties (prefLabel, altLabel) Semantic relations (broader, related) Notes (scopeNote, definition) SKOS: Small UDC Example:  SKOS: Small UDC Example Beware: this is a standard, not everything can be represented! E.g. for UDC, difficult to represent all types of auxiliaries Is -2 Evidence of religion a standard concept? Agenda:  Agenda The Semantic Interoperability problem Demo Semantic Web solutions for interoperability Conceptual vocabulary alignment Conceptual vocabulary representation Conclusion: New opportunities for making knowledge accessible:  Conclusion: New opportunities for making knowledge accessible Integration of collections at the semantic level Semantic integration and vocabulary alignment Representation and publication of conceptual vocabularies SKOS is an open, web-compatible standard Semantic Web research can help Cultural Heritage Vision: a global network of interconnected collections and vocabularies that can be exploited by standard tools? Or somewhere in-between present situation and the vision Discussion: UDC and Semantic Interoperability?:  Discussion: UDC and Semantic Interoperability? UDC as pivot language (spine) for multilingual access Ideal for multilingual scenarios Compatible with common information needs “Front-office” scenario Aligning initial vocabularies to UDC Using UDC in the access system MSAC Multilingual Subject Access to Catalogues of National Libraries UDC as a searching/browsing means, with other vocabularies Discussion: UDC and Semantic Interoperability?:  Discussion: UDC and Semantic Interoperability? “Back-office” scenario? UDC as a background resource for automatic pairwise alignment between the initial vocabularies Multilingual information, rich semantic structure Both scenarios require more accessible UDC And experimentation… Thanks!:  Thanks! Links:  Links STITCH http://stitch.cs.vu.nl Demo collections BNF Mangragore http://mandragore.bnf.fr KB illuminated manuscripts http://www.kb.nl/manuscripts/ Library-originated integration projects: MSAC search interface http://sigma.nkp.cz MACS project http://macs.cenl.org Semantic web links Semantic Web at W3C http://www.w3.org/2001/sw/ SKOS http://www.w3.org/2004/02/skos/ Semantic Web projects dealing with Cultural Heritage MuseumFinland http://www.museosuomi.fi/ eCulture http://e-culture.multimedian.nl/ Demo (1):  Demo (1) Subject vocabulary, collection 1 Subjects Demo (2):  Demo (2) Hierarchical path from root to selected subject Possible specialization for selected subject Demo (3):  Document from Collection 2 Semantic alignment of subjects activated Demo (3) Demo (4):  Demo (4) Subject from voc2 aligned to voc1:amphibians” Back

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