RDF Schema 1

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CmpE 583- Web Semantics Theory and
PracticeINTRODUCTION TORDF SCHEMA

• Atilla ELÇI
• Computer Engineering Department
• Eastern Mediterranean University

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Introduction

• RDF is basis for the world of the Semantic Web.
• RDF Schema is the vocabulary description language
  for defining simple ontology classes in RDF.

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Agenda

• Rudimentary ontology
• RDF Schema (RDFS) language

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RDF Part Played by RDFS

• RDF describes resources over the Internet.
• RDFS is used to create class hierarchies for the
  classification and description of resources.
• Domain-neutral lightweight schema language.
• Its vocabulary description is written in RDF.

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RDF Part Played by RDFS
The Semantic Web Stack A layered approach to
creating the Semantic Web by Tim Berners-Lee,
circa 1998.
W3C Semantic Web Cake
W3C Semantic Web Cake, conceptual, circa 2006
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RDF Schema Intro

• Survey of RDFS elements
• Ch. 9 in Lacy. Notes.
• Self study examples
• Ch. 4 in Yu.

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RDFS in proper by Recommendations

• Section 5 in RDF Primer by Frank Manola, Eric
  Miller (eds.) Introductory volume of the six
  current recommendations
• Figure 18- Vehicle class hierarchy
• Example 23- Vehicle class hierarchy in RDF/XML
• Example 24- Example 23 abbreviated.
• Example 25- An instance.
• Example 28- The full vehicle schema.
• Standard Recommendation of 10 February 2004 RDF
  Vocabulary Description Language 1.0 RDF Schema
  by Dan Brickley, R.V. Guha (eds.).

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RDF Specifications by W3C

• Obsolete recommendations of 1999
• RDF Model and Syntax (1999 Recommendation)
• RDF Schema (1999 Proposed Recommendation).
• Current Recommendations set dated 10 February
  2004
• RDF/XML Syntax Specification (Revised) by Dave
  Beckett (ed.).
• RDF Vocabulary Description Language 1.0 RDF
  Schema by Dan Brickley, R.V. Guha (eds.).
• RDF Primer by Frank Manola, Eric Miller (eds.).
• Resource Description Framework (RDF) Concepts
  and Abstract Syntaxby Graham Klyne, Jeremy
  Carroll (eds.).
• RDF Semantics by Patrick Hayes (ed.)
• RDF Test Cases by Jan Grant, Dave Beckett (eds.).
  

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Where to Get More Information

• A full-day Semantic Web Tutorial by TBL et. al.
• Smith The Semantic Web A Guide to the Future
  of XML, Web Services, and Knowledge Management,
  1st edition, by Kevin T. Smith, Michael C.
  Daconta, Leo J. Obrst. John Wiley Sons, 2003.
  ISBN0471432571. Available as e-book at ACM
  Professional Development Center.
• RDF Schema pp. 43 - 58 in Tutorial on Semantic
  Web Technologies by Ivan Herman, dated 27 Oct
  2004.
• RDF Vocabulary Description Language 1.0 RDF
  Schema by Dan Brickley, R.V. Guha (eds.).
• Semantic Web WWW Consortium Semantic Web pages,
  2004.

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RDFS see also

• Also see
• Figures 5.9 10 and Listings 5.6 7 in Section
  3 on RDF Schema in Chapter 5 in Smith.
• RDF Schema pp. 34 56 in Herman-2006.
• RDF Schema pp. 43 - 58 in Herman
• Further RDFS in Herman
• Classes, Collections, Sequences pp. 59 69
• Graphical interface pp. 70-73.