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This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.
Copyright (C) The Internet Society (2002). All Rights Reserved.
This document describes a media type (application/owl+xml) for use with the RDF/XML serialization of the Web Ontology Language (OWL). OWL is intended to provide a language that can be used to describe the classes and relations between them that are inherent in Web documents and applications.
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Please send comments to <mailto:public-webont-comments@w3.org>. To subscribe, send a message with the body 'subscribe' to <mailto:public-webont-comments-request@w3.org>. The mailing list is publically archived at <http://lists.w3.org/Archives/Public/public-webont-comments/>.
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The Web Ontology Language (OWL) is intended to provide a language that can be used to describe the classes and relations between them that are inherent in Web documents and applications.
The interchange language for OWL is the RDF/XML syntax[4] as described in the OWL Reference[1]. An OWL document may be served with the application/rdf+xml media type in which case the document is interpreted according to the application/rdf+xml media type[3] registration. An OWL document may be served with the application/owl+xml media type in which case it is interpreted according to the OWL Abstract Syntax and Semantics[2].
When an OWL document is served with the application/xml media type, no particular interpretation is indicated and must be arranged by private agreement between publisher and consumer of the document. Application/xml might be used when the document is intended to be an example. The OWL model theory licenses additional entialments from the RDF model theory interpretation of the same RDF/XML document. Such differences between these interpretations are discussed in the OWL model theory document.
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This is a media type registration as defined in Multipurpose Internet Mail Extensions (MIME) Part Four: Registration Procedures[8]
MIME media type name: application
MIME subtype name: owl+xml
Required parameters: none
Optional parameter: charset
Same as charset parameter of application/xml.
Encoding considerations:
Same as charset parameter of application/xml.
Security considerations:
Security considerations include many of those described in section 10 of RFC 3023[6] as well as those described in the application/rdf+xml media type registration[3].
Interoperability considerations:
Published specification: see Web Ontology Language (OWL) 1.0 Reference[1] and OWL Abstract Syntax and Semantics[2] (working drafts as of 2003-03)
Applications which use this media type:
OWL is device-, platform-, and vendor-neutral and is supported by a range of Web Ontology user agents, authoring tools and inferencing engines.
Additional information:
Magic number(s): none
Although no byte sequences can be counted on to consistently identify OWL, RDF documents will have the sequence "http://www.w3.org/1999/02/22-rdf-syntax-ns#" to identify the RDF namespace. This will usually be towards the top of the document. OWL documents may or may not declare the OWL namespace "http://www.w3.org/2002/07/owl#"
File extension(s): .owl,.rdf
Macintosh File Type Code(s): "TEXT"
For further information:
Jonathan Borden <jonathan@openhealth.org>
RDF Logic <www-rdf-logic@w3.org>
More information may be found on the WebOnt website: <http://www.w3.org/2001/sw/WebOnt>
Intended usage: COMMON
Author/Change controller:
The OWL specification is a work product of the World Wide Web Consortium. The W3C and the W3C WebOnt Working Group have change control over the specification.
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application/owl+rdf uses the same fragment identifer syntax and semantics as application/rdf+xml.
The rdf:ID and rdf:about attributes can be used to define fragments in an RDF document.
Section 4.1 of the URI specification[7] notes that the semantics of a fragment identifier (part of a URI after a "#") is a property of the data resulting from a retrieval action, and that the format and interpretation of fragment identifiers is dependent on the media type of the retrieval result.
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This document calls for registration of a new MIME content-type, according to the registration template in section 2.
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| Jonathan Borden | |
| St. Vincent Health System | |
| Section of Neurosurgery | |
| 311 W. 24th Street | |
| Erie, PA 16502 | |
| USA | |
| Phone: | +1 814 455 4868 |
| EMail: | jonathan@openhealth.org |
| URI: | http://www.openhealth.org/ |
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Copyright (C) The Internet Society (2002). All Rights Reserved.
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