- From: Jeff Heflin <heflin@cse.lehigh.edu>
- Date: Tue, 21 Jan 2003 11:51:34 -0500
- To: "Smith, Michael K" <michael.smith@eds.com>
- CC: webont <www-webont-wg@w3.org>
Mike and Chris, At the F2F, I was actioned to review this document. I think it is almost ready, but there are still a few things that need to be fixed. Some of these are simple typos, others a little more substantial, but I think still easily fixed. 1) We need an example of an OWL ontology that consists soley of instances. These will be the most numerous OWL "ontologies" on the Web, so we should at least show people how to do them. I think the easiest way to do this is to take all of the Wine and Winery instances from wine.owl and move them into a third file called winelist.owl. Then in section 3.2.1 (Defining Individuals), we can add something like "Ontologies that describe classes and properties may include descriptions of individuals. However, many ontologies will consist soley of individuals. For example, the wine list of a particular restaurant may be represented as an ontology that describes all of the wines available. In order to include the descriptions of the various styles of wine, this ontology must import wine.owl. An example of this is presented in winelist.owl." 2) Are the classes WineYear and VintageYear supposed to be the same thing? In wine.owl, the VintageYear class is never defined, and the WineYear class is only used to introduce Year1998. 3) I don't think the Section 3.5 Ontology Versioning belongs under basic definitions. I think it should be a section 6 that comes after complex classes, and that Usage Examples should become section 7. The reason is I think the guide reader will be interested in ontology mapping and complex classes, before he or she is interested in ontology versioning. 4) Replace the first paragraph in the Ontology Versioning section (currently 3.5) with the following two paragraphs. (and note the correction of owl:Ontology capitalization in the 2nd parahraph) Ontologies are like software, they will be maintained and thus will change over time. However, once an ontology has been released, other documents on the Web may come to depend on it (for example, by importing it), and any changes may have significant impacts on these dependent documents. Therefore, when a deployed ontology needs to be updated, the original file should not be modified. Instead, the changes should be made to a copy of the ontology which is assigned a different URL. OWL provides some basic properties to describe relationships between different versions of an ontology. Note that these properties need not be used when changing an ontology that is in its design phase and has not been relased yet. In those situations, there are either no dependencies or the dependencies can be managed internally, so standard document or software version management techniques may be used. Within a owl:Ontology element (discussed above), it is possible to link to a previous version of the ontology being defined. owl:priorVersion is a standard tag intended to provide this link, and can be used to track the version history of an ontology. 5) Sect. 4: Ontology mapping, para 3: Tool support will almost certainly be required consistency. should this be: Tool support will almost certainly be required to maintain consistency. 6) Sect. 4.2 sameIndividualAssameAs The statement that sameAs "is available mainly for backwards compatibility" is a little odd. Backwards compatible with what? This is the first version of owl, and I don't think DAML+OIL had sameAs. I think it would be better to say "sameAs is a less verbose synonym of sameIndividualAs." 7) Sect. 4.3, AllDifferent example change rdf:parsetType to rdf:parseType (remove extra 't') "Smith, Michael K" wrote: > > Ok. All changes that Chris and I are aware of have been made. > Glossary added, but not yet linked to other documents. > Not yet passed through RDF, HTML, or pubrules checker. > Will do so in the next few days. > > http://www.w3.org/2001/sw/WebOnt/guide-src/Guide.html > > - Mike > > Michael K. Smith, Ph.D., P.E. > EDS - Austin Innovation Centre > 98 San Jacinto, #500 > Austin, TX 78701 > > * phone: +01-512-404-6683 > * mailto:michael.smith@eds.com
Received on Tuesday, 21 January 2003 11:51:39 UTC