Rebecca S. Guenther wrote:
> I haven't heard any comments about this suggestion below.

Hi again Rebecca

I agree Ray's solution is probably the simplest option that makes the
PREMIS XSD valid again, and does so in the (inflexible but readable)
style of the original.

However if the true design intention is that these two date elements are
in fact of the same type (as they probably should be), the logical scope
for the type definition is global, either from PREMIS.xsd, or a separate
definitions file that can be included by any of the component schemas.

Thus far I have only referenced PREMIS.xsd in my XML models; the
flexibility of referencing individual components separately seems less
valuable to me, than being able to redefine locally those element types
(EventType, AgentType...) that the PREMIS report itself earmarks for
local control. Readability of the /raw/ schema also seems a relatively
unimportant goal - XSLT can deal with that.

Therefore, I would still urge a rethink of the extensibility of the
current XML Schema implementation of PREMIS, along the lines Ray and I
have suggested, and echo Jerome's concerns about the risks of
arbitrarily locking the current implementation down for a year with no
hope of remission.

HTH

Richard


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\ Richard M Davis
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\ University of London Computer Centre
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