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Subject: Issue in OpenDocument-package-metadata-v1.2-cd1.owl

Dear Committee,

I took a look at OpenDocument-package-metadata-v1.2-cd1.owl that has 
gone into public review and OpenDocument-metadata-v1.2-cd03.owl. I think 
there are a few typos in both.

It has to do with the owl:DatatypeProperty and owl:ObjectProperty. They 
don't actually provide any semantics to a model, they are intended as a 
help to editing tools. They let the tools know what values a property 
can take. If a property is an owl:ObjectProperty then the property is a 
link to another resource - an object. If it is an owl:DatatypeProperty 
then it takes a literal - text or number.

In OpenDocument-metadata-v1.2-cd03.owl the 
http://docs.oasis-open.org/ns/office/1.2/meta/odf#prefix and 
http://docs.oasis-open.org/ns/office/1.2/meta/odf#suffix are declared as 
owl:ObjectProperties and this conflicts with the range declaration, 
which is an xsd:string.

The same issue occurs in OpenDocument-package-metadata-v1.2-cd1.owl with 
the same resources.

One final thing: When ODF 1.2 documents start to get indexed by semantic 
search engines, you can expect them to try to get more information on 
the URLs these classes and properties really are. For the class 
'http://docs.oasis-open.org/ns/office/1.2/meta/pkg#Document' they will 
do the equivalent of:

wget --header='Accept: application/rdf+xml' 

This is how the semantic web "learns" what things mean. You should post 
you OWL schema on this URL in order to cooperate with the semantic web, 
or the OWL of ODF is pointless. Here is a tutorial describing the 
concepts: http://www4.wiwiss.fu-berlin.de/bizer/pub/LinkedDataTutorial/

Best regards,

Søren Roug
European Environment Agency

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