The Standardization of Semantic Web Ontology
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The document discusses the semantic web as an extension of the current web, which enables machines to understand information semantics for better cooperation between computers and humans. It describes the semantic web stack, introducing the web ontology language (OWL) for representing knowledge, and outlines the enhancements in OWL 2, including various expressive features and profiles for different applications. The document also highlights the need for standardization in semantic web ontology to improve data interoperability and knowledge representation.
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The Standardization of Semantic Web Ontology
- 1. The Standardization of Semantic Web OntologyDr. Myungjin Lee
- 3. The Semantic WebThe 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-LeeThe 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 Wikipedia3
- 4. Semantic Web StackThe 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 StackRepresenting Knowledgein the Semantic Web(2005)Rule Interchange Format (RIF)Highlight (2007)5
- 6. Technologies Classified by W3C6
- 7. Comparing the Stack with ClassificationVertical ApplicationsInferenceVocabulariesQueryLinked Data7
- 8. Recommendations for the Semantic Web8RIFOWL 2OWL 1SPARQLRDFSRDF
- 11. Web Ontology LanguageThe Web Ontology Language (OWL) is a family of knowledge representation languages for authoring ontologies.From WikipediaAn ontology is an explicit specification of a conceptualization.By Tom Gruber11OWL 2OWL 1
- 12. OWL 2 Web Ontology Language12
- 14. OWL 2 Syntaxes14
- 15. Expressiveness of OWL 2 Attributive language. This is the base language which allows: Atomic negation
- 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 restrictions15OWL DLOWL LiteOWL 2
- 19. New Functionality of OWL 2Simple metamodeling capabilities
- 20. Punning
- 22. Annotations
- 23. Axioms about annotation properties
- 25. Declarations
- 26. Top and Bottom Properties
- 27. IRIs
- 29. Minor features
- 32. DisjointUnion
- 33. DisjointClasses
- 35. New constructs for properties
- 36. Self Restriction
- 37. Property Qualified Cardinality Restrictions
- 38. Reflexive, Irreflexive, and Asymmetric Object Properties
- 41. Keys
- 43. Extra Datatypes and Datatype Restrictions
- 44. N-aryDatatypes
- 46. Data Range CombinationOWL 2 ProfilesOWL 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 efficiency17OWLRLOWLELOWLQL