Re: [Scrollkeeper-devel] URN as identifier

[Kendall C. <ke...@mo...>]

>>>>> "bob" == Bob Stayton <bo...@sc...> writes:

  >> From: Kendall Clark <ke...@mo...>
  bob> Hi Kendall, It was very helpful to hear from you. Are you still
  bob> the maintainer of the OMF DTD?

No technically, though I forget who took it over (haven't heard
anything since then).
 
   bob> Actually, Dublin Core has done just that with the element
  bob> qualifiers they published 2000-07-11.  They are described in
  bob> <http://dublincore.org/documents/dcmes-qualifiers/>.  For the
  bob> <relation> element, they have:

  bob>   Is Version Of Has Version Is Replaced By Replaces Is Required
  bob>   By Requires Is Part Of Has Part Is Referenced By References
  bob>   Is Format Of Has Format

Yeah, these are nicely general; of course, SK and OMF still needs
(together or separately) figure out what these will mean in our
domain, how and when to use them, etc.

  bob> The one that caught my eye was "Is Version Of", since that
  bob> seems to capture the relation between a given document and the
  bob> seriesID.

Yes.

  bob> The question is then: How is this encoded in an OMF metadata? I
  bob> notice that the OMF <relation> element already has a "status"
  bob> attribute by virtue of the core attribute set in the DTD.  It
  bob> would seem we could just assign a specific value for the status
  bob> attribute.  For example:

  bob> <relation status="IsVersionOf"
  bob> url="seriesID-expressed-as-uri"/>

I'd prefer something like:

    <relation [dc-namespace]:type="IsVersionOf" uri="..." />

One thing that someone needs to do re: OMF is fix the URL/URL
ambiguity in the spec and the DTD. I favor using URL only when there's
a shared expectation that something is fetchable.

  bob> This means the document connected to this OMF <resource> is a
  bob> version of the seriesID.

Yeah, but what does "version of the seriesID" mean? It could be an
item in a revision history. Is that what you mean?

IsVersionOf could also just as well mean "this resource is a shorter,
excerpted version of this other resource over here".

  bob> Right.  To quote from the Dublin Core qualifiers document:

  bob> "It is expected that implementors will develop additional
  bob> qualifiers for use within local applications or specific
  bob> domains. Such qualifiers may not be understood by other
  bob> applications."

  bob> We could make it more SK or OMF specific by saying:

  bob> <relation status="omf-series-id"
  bob> url="seriesID-expressed-as-uri"/>

Yes, and at the risk of being a redundant doof, I think someone needs
to specify the meaning and use of the DC qualifiers *in the OMF and SK
context*, as well as any further OMF/SK-specific specifiers.

OMF needs some RDDL work done for all this meta-schema documentation.

Kendall
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