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IJCAI-09 Workshop on Identity and Reference in web-based KR (IR-KR)

IJCAI-09 Workshop on Identity and Reference in web-based KR (IR-KR). Paolo Bouquet University of Trento (Italy) July 11, 2009. Why KR on the Web.

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IJCAI-09 Workshop on Identity and Reference in web-based KR (IR-KR)

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  1. IJCAI-09 Workshop onIdentity and Referencein web-based KR (IR-KR) • Paolo Bouquet • University of Trento (Italy) • July 11, 2009

  2. Why KR on the Web Knowledge representation is a field which seems to have the reputation of being initially interesting, but which did not seem to shake the world to the extent that some of its proponents hoped […] This is exactly the state which the hypertext field was in before the Web. The Semantic Web is what we will get if we perform the same globalization process to Knowledge Representation that the Web initially did to Hypertext. [Tim Berners-Lee, What the Semantic Web can represent, DesignIssues, 1998]

  3. The parallel • The Web has enabled a single global space for the publication of hypertexts • The Semantic Web has enabled a single global space for the publication of data and knowledge In both cases, the key concept is that of resolvable URI • The use of URIs for as a way to identify and refer to “things” is perhaps the single most important difference between traditional KR and web-based KR • Principle of Global Identifiers: “Global naming leads to global network effects"

  4. New issues This central role of identity and reference for a web-scale KR poses new challenges to traditional KR. Examples: • Is it appropriate to formalize URIs (especially HTTP URIs) as non-logical symbols in a formal language (e.g. FOL)? • What is the appropriate notion of identity when using the same URI in different models? Are URIs rigid or non-rigid designators? • What is the appropriate semantics of "linking by reference” across distributed knowledge bases? • How all this affect distributed reasoning across theories? • …

  5. New opportunities The use of URIs for KR opens new opportunities: • Location-based interlinking • Browsing across knowledge sources • Provenance and trust … and more: • Data integration by graph merging • Search and indexing • Scalability

  6. Objectives of IR-KR2009 • Exposing the KR @ AI community to these issues, after the past three “webby” events: • the WWW2006 workshop on Identity and Reference on the Web (IRW2006) • the WWW2007 workshop on Identity, Identifiers, Identification (I3) • the ESWC2008 workshop on Identity and Reference on the Semantic Web (IRSW2008) • Open the debate on the impact that the new challenges and opportunities of web-oriented KR pose to some of the core concepts of KR in AI • Find new ideas / solutions for KR on the Web

  7. Workshop program • 08:45-09:00: Welcome & Introduction (Paolo Bouquet) • 09:00-09:30: Is the Web a Web of Documents or Things? (Xiaoshu Wang and Arlindo Oliveira) • 09:30-10:00: Denotation as a Two-Step Mapping in Semantic Web Architecture (David Booth) • 10:00-10:30: Coffee break • 10:30-11:00: Identity and Reference for the Global Giant Graph (Paolo Bouquet, ChiaraGhidini, LucianoSerafini) • 11:30-12:00: RDF-AI: an Architecture for RDF Datasets Alignment, Fusion and Interlink (Francois Scharffe, Yanbin Liu and Chunguang Zhou) • 12:00-12:30: Invited demo on Sig.ma: Entity-centric search on the Web (Giovanni Tummarello) • 12:30-14:00: Lunch break

  8. … • 14:00-14:30: The URI Lifecycle in Semantic Web Architecture (David Booth) • 14:30-15:00: From unstructured to linked data: entity extraction and disambiguation by collective similarity maximization (TadejŠtajner) • 15:00-15:30: Coffee break • 15:30-16:00: Uniting "a priori" and "a posteriori" knowledge: A research framework (Michael Witbrock, Elizabeth Coppock and Robert Kahlert) • 16:00-16:30: Algebraic Information Extraction of Enterprise Data: Methodology and Operators (Wojciech M. Barczynski, Falk Brauer, Alexander Löser and Adrian Mocan) • 16:30-17:30: Final discussion and wrap-up

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