Re: [xtm-wg] [xtm-iss] why not IDREF(s) instead of CDATA in tm.dtd type refs ?

[Steve Pepper <pepper@ontopia.net>]

At 10:53 20/09/00 +0000, tomas@idoox.com wrote: 

> we were studying the uploaded XTM DTD
> (tm.dtd) and we don't understand
> why "IDREF" and "IDREFS" type were not used for
> type(s) attributes of 
> elements topicmap:topic, topicmap:occurs, topicmap:assoc,
> topicmap:assocrl, topicmap:facet and topicmap:facetval.
>
> The ISO Standard uses "CDATA" too, but says
> "Reference"
> in the comment. The "music" example uses topic id's for types,
> what we
> think should be enforced, because it shall be possible to 
> understand
> these values programmatically. 
>
> Thanks for your comments on this


Sorry, Tomas, I missed this a while back. The point is
that ID/IDREF
referencing restricts you to a single document. You might want to
have the typing topics in one document (the "template") and
their
instances in another. In order to do that you need to be able to do
cross-document addressing. Since XTM is in webland, the way to do
this is through URLs, not IDREFs.

Steve

--

Steve Pepper, Chief Technology Officer, Ontopia AS. (+47 908 27246)

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