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[DPF]Meta Data unusable

From: Keith Waters <kwaters@ftrd.us>
Date: Fri, 3 Jun 2005 09:48:51 -0400
Message-Id: <0929FAA0-9D62-4043-96FE-89493F3D1631@ftrd.us>
To: www-di@w3.org

Hi Jeremy,

This message contains a response to comments on

http://www.w3.org/TR/2004/WD-DPF-20041122/

s7.
Metadata is unusable

The end of 4.2.1 provides a metadata interface, but with no
indication of what are the legal values for either of the
two attributes they are unusable - they have no semantics.
My preference is to delete these attributes and say that
metadata about a property (i.e. the concept that is being used,
rather than the value of the property in this particular context)
should be provided in RDF/XML at the URI created by concatenating
the namespaceURI with the name (as in RDF/XML).


To address this Meta Data issue, the following section 4.1.5 Meta  
Data has been added to the WD.

4.1.5 Meta Data

Meta data can be directly or indirectly associated with DPF  
properties. Some potential examples of interesting meta data include  
the version of a property interface, and timestamps for property  
creation and modification. Richer meta data could describe ontologies  
of properties, and be expressed using powerful meta data frameworks  
like OWL [OWL] for the purposes of authoring solutions.

Note that the kinds of meta data and their representation is outside  
the scope of this specification. The DPFMetaDataExtInterface  
interface provides a means for accessing meta data directly  
associated with a property, in terms of a pointer to an interface for  
the meta data and a DOMString value identifying the type for that  
interface.

-Keith Waters
Received on Friday, 3 June 2005 14:11:39 GMT

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