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The Standardization of Semantic Web Ontology
 

The Standardization of Semantic Web Ontology

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This presenation shows the trand of standardization for the Semantic Web and OWL 2 Web Ontology Language.

This presenation shows the trand of standardization for the Semantic Web and OWL 2 Web Ontology Language.

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    The Standardization of Semantic Web Ontology The Standardization of Semantic Web Ontology Presentation Transcript

    • The Standardization of Semantic Web Ontology
      Dr. Myungjin Lee
    • The Semantic Web
    • The Semantic Web
      The Semantic Web is not a separate Web but an extension of the current one, in which information is given well defined meaning, better enabling computers and people to work in cooperation.
      By Tim Berners-Lee
      The Semantic Web is a group of methods and technologies to allow machines to understand the meaning - or "semantics" - of information on the World Wide Web.
      From Wikipedia
      3
    • Semantic Web Stack
      The Semantic Web Stack, also known as Semantic Web Cake or Semantic Web Layer Cake, illustrates the architecture of the Semantic Web.
      Semantic Web - XML2000 (2000)
      4
    • Semantic Web Stack
      Representing Knowledge
      in the Semantic Web(2005)
      Rule Interchange Format (RIF)
      Highlight (2007)
      5
    • Technologies Classified by W3C
      6
    • Comparing the Stack with Classification
      Vertical Applications
      Inference
      Vocabularies
      Query
      Linked Data
      7
    • Recommendations for the Semantic Web
      8
      RIF
      OWL 2
      OWL 1
      SPARQL
      RDFS
      RDF
    • Other Specifications
      9
    • Web Ontology Language
    • Web Ontology Language
      The Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies.
      From Wikipedia
      An ontology is an explicit specification of a conceptualization.
      By Tom Gruber
      11
      OWL 2
      OWL 1
    • OWL 2 Web Ontology Language
      12
    • OWL 2 Documents
      13
    • OWL 2 Syntaxes
      14
    • Expressiveness of OWL 2
      Attributive language. This is the base language which allows:
      • Atomic negation
      • Concept intersection
      • Universal restrictions
      • Limited existential quantification
      Complex concept negation
      Role hierarchy (subproperties - rdfs:subPropertyOf)
      Nominals. (Enumerated classes of object value restrictions - owl:oneOf, owl:hasValue).
      Inverse properties
      Functional properties
      Cardinality restrictions (owl:Cardinality, owl:MaxCardinality)
      Use of datatype properties, data values or data types
      Limited complex role inclusion axioms; reflexivity and irreflexivity; role disjointness
      Qualified cardinality restrictions
      15
      OWL DL
      OWL Lite
      OWL 2
    • New Functionality of OWL 2
      • Simple metamodeling capabilities
      • Punning
      • Extended Annotations
      • Annotations
      • Axioms about annotation properties
      • Other Innovations
      • Declarations
      • Top and Bottom Properties
      • IRIs
      • Imports and Versioning
      • Minor features
      • Anonymous Individuals
      • Inverse Properties
      16
      • Syntactic sugar
      • DisjointUnion
      • DisjointClasses
      • NegativeObjectPropertyAssertion and NegativeDataPropertyAssertion
      • New constructs for properties
      • Self Restriction
      • Property Qualified Cardinality Restrictions
      • Reflexive, Irreflexive, and Asymmetric Object Properties
      • Disjoint Properties
      • Property Chain Inclusion
      • Keys
      • Extended datatype capabilities
      • Extra Datatypes and Datatype Restrictions
      • N-aryDatatypes
      • Datatype Definitions
      • Data Range Combination
    • OWL 2 Profiles
      • OWL 2 EL
      • the expressive power used by many large-scale ontologies
      • OWL 2 QL
      • the expressive power typically used in simple ontologies like thesauri, and (most of) the expressive power of ER/UML schemas
      • OWL 2 RL
      • for OWL 2 applications that can trade the full expressivity of the language for efficiency
      17
      OWL
      RL
      OWL
      EL
      OWL
      QL
    • Question and Answer
      18