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   Re: [xml-dev] RDDL possibilities

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John Cowan wrote:

> Jonathan Borden scripsit:
> > I am not sure what a "Published Subject Indicator" is, so at least I did
> > consider that solution. What would that look like?
> A subject indicator is a resource (web page, mailbox, what have you)
> that by convention refers to a certain concept or Real World object.
> For example, my mailbox could be a SI for me, or yours for you.
> A copy of the XML 1.0 Recommendation could be a SI for the
> concept of XML 1.0.  The page http://www.w3c.org could be an SI for the

In this case an SI is the same as a URI.

SI: http://www.w3c.org
subject: "the W3C"

URI: http://www.w3c.org
resource: "the W3C"

If this is the case then, yes RDDL uses SIs. Steve Newcomb and I once had a
discussion regarding the difference between a TM: "subject" and an RDF:
"resource". My understanding was roughly that an RDF "resource" encompasses
both a TM: "subject" as well as a "topic".

> A published SI is one that's available to the general public,
> having been promulgated by someone for the purpose.   For
> example, http://www.iana.org/assignments/media-types/image/cgm
> is a PSI for the MIME format image/cgm.

Perhaps a URI published in a publically available RDDL document, makes a PSI
then? The definitions for these things seem too wiggly for me to have much
confidence in any such assertion however but I am happy if anyone is in an
authoritative position to do so.



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