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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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  • 1. The Standardization of Semantic Web Ontology
    Dr. Myungjin Lee
  • 2. The Semantic Web
  • 3. 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
  • 4. 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
  • 5. Semantic Web Stack
    Representing Knowledge
    in the Semantic Web(2005)
    Rule Interchange Format (RIF)
    Highlight (2007)
    5
  • 6. Technologies Classified by W3C
    6
  • 7. Comparing the Stack with Classification
    Vertical Applications
    Inference
    Vocabularies
    Query
    Linked Data
    7
  • 8. Recommendations for the Semantic Web
    8
    RIF
    OWL 2
    OWL 1
    SPARQL
    RDFS
    RDF
  • 9. Other Specifications
    9
  • 10. Web Ontology Language
  • 11. 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
  • 12. OWL 2 Web Ontology Language
    12
  • 13. OWL 2 Documents
    13
  • 14. OWL 2 Syntaxes
    14
  • 15. Expressiveness of OWL 2
    Attributive language. This is the base language which allows:
    • Atomic negation
    • 16. Concept intersection
    • 17. Universal restrictions
    • 18. 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
  • 19. New Functionality of OWL 2
    16
    • Syntactic sugar
    • 32. DisjointUnion
    • 33. DisjointClasses
    • 34. NegativeObjectPropertyAssertion and NegativeDataPropertyAssertion
    • 35. New constructs for properties
    • 36. Self Restriction
    • 37. Property Qualified Cardinality Restrictions
    • 38. Reflexive, Irreflexive, and Asymmetric Object Properties
    • 39. Disjoint Properties
    • 40. Property Chain Inclusion
    • 41. Keys
    • 42. Extended datatype capabilities
    • 43. Extra Datatypes and Datatype Restrictions
    • 44. N-aryDatatypes
    • 45. Datatype Definitions
    • 46. Data Range Combination
  • OWL 2 Profiles
    • OWL 2 EL
    • 47. the expressive power used by many large-scale ontologies
    • 48. OWL 2 QL
    • 49. the expressive power typically used in simple ontologies like thesauri, and (most of) the expressive power of ER/UML schemas
    • 50. OWL 2 RL
    • 51. for OWL 2 applications that can trade the full expressivity of the language for efficiency
    17
    OWL
    RL
    OWL
    EL
    OWL
    QL
  • 52. Question and Answer
    18

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