Round 3

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This page has information about a round of publication of working group documents.


General Information

Target Date 2008-10-08
Previous Round Round 2
Documents
  1. Syntax
  2. Direct Semantics
  3. RDF-Based Semantics
  4. Mapping to RDF Graphs
  5. XML Serialization
  6. Profiles
  7. Test
Overall Status

Compatibility with OWL 1

The OWL Working Group intends to make OWL 2 be a superset of OWL 1, except for a limited number of situations where we believe the impact will be minimal. This means that OWL 2 will be backward compatible, and creators of OWL 1 documents need only move to OWL 2 when they want to make use of OWL 2 features. More details and advice concerning migration from OWL 1 to OWL 2 will be in future drafts.

Document Details

Document Syntax
Summary of Changes

This document has been significantly updated in several ways since the version of 11 April 2008.

  • Using the same URI to denote more than one type of property is now disallowed, and so it using the same URI to denote both a class and a datatype. The role of a URI in an ontology is determined by the declarations available in the ontology.
  • The terminal symbols of the functional-style syntax have been simplified by removing "typed" variants. For example, instead of distinct terminal symbols ObjectSomeValuesFrom and DataSomeValuesFrom for restrictions on object and data properties, respectively, the functional-style syntax now uses as single terminal symbol SomeValuesFrom for both types of restrictions.
  • The document has been considerably extended and now serves as a reference for the language. The specification now contains a number of examples that describe the intuitive meaning of various OWL 2 constructs.
  • The language has been extended with key axioms and top and bottom object and data properties.
  • The set of datatypes supported in OWL 2 has been precisely specified.
  • Annotations are now allowed on annotations.
  • Anonymous individuals have been added to the language.
  • Ontologies can have versions.
  • The treatment of imports has been clarified, including the determination of where an ontology should reside.
  • A number of errors and omissions have been corrected.


Document Direct Semantics
Summary of Changes

There are several major changes to this document since the version of 11 April 2008. A number of changes reflect the major revamping of the functional syntax to disallow punning between classes and datatypes and between object, data, and annotation properties. Semantics of Keys has been added. A set of inference problems has been defined. An extended discussion of datatypes has been added. Some minor changes were made to reflect changes in the Functional Syntax.


Document RDF-Based Semantics
FPWD Comment

@@@ TBD


Document Mapping to RDF Graphs
Summary of Changes

The major change to this document since the version of 11 April 2008 reflects the major revamping of the functional syntax to disallow punning between classes and datatypes and between object, data, and annotation properties and to include mapping for new features such as keys. Some minor changes were made to reflect changes in the Functional Syntax.


Document XML Serialization
Summary of Changes

The major change to this document since the version of 11 April 2008 reflects the major revamping of the functional syntax to disallow punning between classes and datatypes and between object, data, and annotation properties. Some minor changes were made to reflect changes in the Functional Syntax.


Document Profiles
Summary of Changes

This document was updated since the version of 11 April 2008 in the following ways.

  • The profiles were renamed into OWL 2 EL, OWL 2 QL, and OWL 2 RL.
  • The definition of each profile has been updated in accordance with the major changes of the structural specification.
  • A number of errors and omissions in all three profiles were corrected.
  • The OWL 2 RL profile has been substantially further developed.


Document Test
FPWD Comment

@@@ TBD