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1 © NOKIA 2/12/ Ora Lassila I Was There… – Memoirs of an RDF Working Group Member or Observations about the RDF Design Rationale Ora Lassila Research Fellow, Nokia Research Center December 2000
2 © NOKIA 2/12/ Ora Lassila RDF Timeline 1997 SpringPre-WG work (e.g., PICS-NG), authors MIT 1997 SummerM+S Working Group chartered, M+S first draft (for group review) 1997 OctoberM+S first public draft 1997 NovemberRDFS Working Group chartered 1998 AprilRDFS first draft (for group review) 1998 OctoberM+S goes to last call 1999 JanuaryM+S goes to proposed recommendation 1999 FebruaryM+S goes to recommendation! 1999 MarchRDFS goes to proposed recommendation 1999 AugustRDF Interest Group formed 1999 OctoberThe Cambridge Communiqué published 2000 MarchRDFS goes to candidate recommendation
3 © NOKIA 2/12/ Ora Lassila Motivation library metadata (Dublin Core) content rating (PICS) site maps some other applications…
4 © NOKIA 2/12/ Ora Lassila Model Ora (from PICS-NG): frame-like model Guha: understanding which statements have been asserted, and which ones have not WG charter included mandatory PICS support certain features, which cannot really be implemented in the model itself, crept in (aboutEachPrefix) Acceptance & deployment was very important just simple enough for the WWW community at large to accept and deploy not too offensive for the KR community so it could be used as a starting point for something better main challenge: managing expectations
5 © NOKIA 2/12/ Ora Lassila Syntax Naming (e.g., Pumpkin) S-expressions vs. XML in some sense, the choice of XML was an unfortunate one, because it leads to a lot of confusion Namespaces were deemed necessary, and consequently an XML NS spec which supports RDF needs was rammed through at W3C issues with the namespace of attributes like about Interpretation of literals XML Schema was supposed to provide primitive datatypes
6 © NOKIA 2/12/ Ora Lassila Details, Details, Details, … RDF is supported by a number of other standards XML URI HTTP (caching semantics) … It is important to understand that RDF takes care of a lot of dirty details which we now no longer have to worry about
7 © NOKIA 2/12/ Ora Lassila Type System & Ontology - RDF Schema Basic definition of Class defined as a prototype rather than a classification Metaclass issues proved to be hard ANSI X3J13 as an inspiration, but simplified class Class and class Metaclass are the same thing DisjointWith and cardinalities: discussed but eventually rejected Domain & range proved to be hard (for the WG) subPropertyOf vs. subClassOf
8 © NOKIA 2/12/ Ora Lassila Mysteries of Domain & Range yx pc type domainClass type Property type
9 © NOKIA 2/12/ Ora Lassila Other Issues Dueling press releases Netscapes love for RDF vs. Microsofts marketing message a lot of the RDF M+S work happened at the height of the so-called browser wars WG member troubles skill/experience vs. technical complexity mismatch RDFS vs. XML Schema cf. the Cambridge Communiqué RDFS still not a recommendation…
10 © NOKIA 2/12/ Ora Lassila Questions? Lauren Lassila (age 3 months) finds the RDF Design Rationale a perfect bedtime story. yawn…
1 © NOKIA 10/12/ Ora Lassila RDF: A Frame System for the Web Ora Lassila (with help from Henry S. Thompson) Agent Technology Group Nokia Research.
SWOG - Semantic Web Ontology Generator Masters Defense of Dackral Scott Phillips Committee Members: Juan E. Gilbert, Ph. D. T. Dean Hendrix, Ph. D. N.
TU/e technische universiteit eindhoven Web Data and Metadata Geert-Jan Houben.
Status on the Mapping of Metadata Standards ISO/IEC 11179, SDMX, and Others Arofan Gregory, Executive Manager Open Data Foundation, Inc. METIS Meeting,
LIS901N: URI Thomas Krichel ??. URIs (background) URI: uniform resource identifier Originally, a generalization of: –URL (uniform resource locator),
RDF and Metadata Andy Powell UKOLN, University of Bath UKOLN is funded by the Library and Information Commission,
An Introduction To The Semantic Web Brian Kelly UK Web Focus UKOLN University of Bath UKOLN is supported by: URL
Metadata vocabularies and ontologies Dr. Manjula Patel Technical Research and Development
Vocabulary Management Task Force Tom Baker Semantic Web Best Practices and Deployment Working Group W3C Technical Plenary Boston,
Ontology Assessment – Proposed Framework and Methodology.
XBRL Standards – Status Report München, Germany – CEBS Workshop Hugh Wallis Director of Standards Development XBRL International Inc.
On and use=document|rpc, style=literal|encoded A personal opinion Sanjiva Weerawarana IBM Research September 9-11, 2002.
XML Signature 2.0. Timelines 2002 – XML Signature – XML Signature 1.0, 2 nd edition –Adds support for Canonicalization 2009 end – XML Signature.
Interoperability and semantics in RDF representations of FRBR, FRAD and FRSAD Gordon Dunsire Presented at the Cologne Conference on Interoperability and.
Andy Powell, Eduserv Foundation Feb 2007 The Dublin Core Abstract Model – a packaging standard?
Electronic Publishing, Digital Archiving and Licensing workshop Frankfurt October Norman Paskin, International DOI Foundation
Encoding DC in (X)HTML, XML and RDF Andy Powell UKOLN, University of Bath, UK UKOLN is supported by: Tutorial.
1OReilly Enterprise Java Conference, 2001An Introduction to RDF.
WSDL Mapping to RDF/Semantic Web July, 2004 London, England F2F.
DC Architecture WG meeting Monday Sept 12 Slot 1: Slot 2: Location: Seminar Room 4.1.E01.
Dublin Core for Museums Day 2 Paul Miller UK Office for Library & Information Networking Thomas Hofmann Australian Museums On- Line.
RDA vocabularies and concepts Gordon Dunsire Depute Director, Centre for Digital Library Research University of Strathclyde, Glasgow, Scotland Presented.
OWL 1.1 Design Decisions OWL 1.1 Draft Team. 2/15 Contents General Design Principles Structural Specification Expressivity Enhancements Metamodeling Anonymous.
TU/e technische universiteit eindhoven Web Engineering & Web Information Systems Technology Geert-Jan Houben.
University of Toronto Michael Gruninger University of Toronto, Canada Leo Obrst MITRE, McLean, VA, USA February 6, 2014February 6, 2014February 6, 2014.
METSÄNTUTKIMUSLAITOS SKOGSFORSKNINGSINSTITUTET FINNISH FOREST RESEARCH INSTITUTE Expert evaluation - details - Jarmo Saarikko (Metla team)
© O. Corcho 1 Ontological Engineering Ontology languages Oscar Corcho Ontological Engineering Group Laboratorio.
DOI workshop doi>. Workshop covering full implementation Mix of IDF members, prefix holders, others (42 registrants) Flexible agenda, open discussion.
LIS901N lecture 5: http URI and apache Thomas Krichel
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