A formal specification for how RIF can be used with RDF and OWL, including the semantics of different ways of importing RDF data and OWL ontologies into RIF rule systems.

This document serves as an introduction to OWL 2 and the various other OWL 2 documents. It describes the syntaxes for OWL 2, the different kinds of semantics, the available profiles (sub-languages), and the relationship between OWL 1 and OWL 2.

The meaningful constructs provided by OWL 2 are defined in terms of their structure. As well, a functional-style syntax is defined for these constructs, with examples and informal descriptions. One can reason with OWL 2 ontologies under either the RDF-Based Semantics or the Direct Semantics. If certain restrictions on OWL 2 ontologies are satisfied and the ontology is in OWL 2 DL, reasoning under the Direct Semantics can be implemented using techniques well known in the literature.

This document defines the mapping of OWL 2 ontologies into RDF graphs, and vice versa.

This document provides the direct model-theoretic semantics for OWL 2, which is compatible with the description logic SROIQ. Furthermore, this document defines the most common inference problems for OWL 2.

This document defines the RDF-compatible model-theoretic semantics of OWL 2.

This document describes the conditions that OWL 2 tools must satisfy in order to be conformant with the language specification. It also presents a common format for OWL 2 test cases that both illustrate the features of the language and can be used for testing conformance.

This document provides a specification of several profiles of OWL 2 which can be more simply and/or efficiently implemented. In logic, profiles are often called fragments. Most profiles are defined by placing restrictions on the structure of OWL 2 ontologies. These restrictions have been specified by modifying the productions of the functional-style syntax.

This primer provides an approachable introduction to OWL 2, including orientation for those coming from other disciplines, a running example showing how OWL 2 can be used to represent first simple information and then more complex information, how OWL 2 manages ontologies, and finally the distinctions between the various sublanguages of OWL 2.

This document is a simple introduction to the new features of the OWL 2 Web Ontology Language, including an explanation of the differences between the initial version of OWL and OWL 2. The document also presents the requirements that have motivated the design of the main new features, and their rationale from a theoretical and implementation perspective.

This document provides a non-normative quick reference guide to the OWL 2 language. It also provides links to other documents, including the OWL 2 Primer for language introduction and examples, the OWL 2 Structural Specification and Functional Syntax document for more details of the functional syntax, and the OWL 2 New Features and Rationale document for new feature descriptions.

This document specifies an XML serialization for OWL 2 that mirrors its structural specification. An XML schema defines this syntax and is available as a separate document, as well as being included here.

This document presents the specification of a primitive datatype for the plain literals of RDF.

Please see the description of the newer, comparable document: "OWL 2 Web Ontology Language Document Overview"

Please see the description of the newer, comparable document: "OWL 2 Web Ontology Language Primer"

This document contains a structured informal description of the full set of OWL language constructs and is meant to serve as a reference for OWL users who want to construct OWL ontologies. See the newer, comparable document: "OWL 2 Web Ontology Language Structural Specification and Functional-Style Syntax"

See the newer, comparable document: "OWL 2 Web Ontology Language Structural Specification and Functional-Style Syntax"

See the newer, comparable document: "OWL 2 Web Ontology Language Conformance"

A detailed explanation of how to implement OWL 2 RL reasoning using RIF Core.

The Manchester syntax is a user-friendly compact syntax for OWL 2 ontologies; it is frame-based, as opposed to the axiom-based other syntaxes for OWL 2. The Manchester Syntax is used in the OWL 2 Primer, and this document provides the language used there. It is expected that tools will extend the Manchester Syntax for their own purposes, and tool builders may collaboratively extend the common language.

This document specifies a syntax and semantics for incorporating linear equations with rational coefficients solved in the reals in OWL 2.

This document presents ontology patterns for representing n-ary relations in RDF and OWL and discusses what users must consider when choosing these patterns.

This document addresses three questions left unanswered by these Recommendations: Which URIref should be used to refer to a user defined datatype? Which values of which XML Schema simple types are the same? How to use the problematic xsd:duration in RDF and OWL? In addition, we further describe how to integrate OWL DL with user defined datatypes

This document describes two methods to represent various descriptive "features" (also known variously as "qualities", "attributes" or "modifiers") and their specified values: 1) as partitions of classes; and 2) as enumerations of individuals. It does not discuss the use of datatypes to represent lists of values.

This document addresses the issue of using classes as property values in OWL and RDF Schema.

See the newer, comparable document: "OWL 2 Web Ontology Language Mapping to RDF Graphs".

This document describes a mechanism for providing a precise semantics for the Semantic Web Languages (referred to as SWELs from now on. The purpose of this is to define clearly the consequences and allowed inferences from constructs in these languages.

This document presents an ontology of temporal concepts, OWL-Time (formerly DAML-Time) [4,10], for describing the temporal content of Web pages and the temporal properties of Web services. The ontology provides a vocabulary for expressing facts about topological relations among instants and intervals, together with information about durations, and about datetime information. We also demonstrate in detail, using the Congo.com and Bravo Air examples from OWL-S [11], how this time ontology can be used to support OWL-S, including use cases for defining input parameters and (conditional) output parameters. A use case for meeting scheduling is also shown. In the appendix we also describe a time zone resource in OWL we developed for not only the US but also the entire world, including the time zone ontology, the US time zone instances, and the world time zone instances.

This document presents a standard conversion of Princeton WordNet to RDF/OWL. It describes how it was converted and gives examples of how it may be queried for use in Semantic Web applications.