[OAI-implementers] Validating ListMetadataFormats

[Leigh Dodds]

> Of course it is trivial to write a program to do the test, but I was hoping
> to find a fully declarative solution, so that our formal requirements
> [http://www.language-archives.org/OLAC/protocol.html] can be accompanied by
> one or more XML documents which more or less transparently implement them.
> 
> I would be grateful for any advice about how to test for set membership
> using an XML validation language.

You should take a look at Schematron [1] which is an validation language 
implemented using XSLT. I presented a paper at XSLT-UK provides 
some addtional background [2]. 

Schematron provides the kinds of constraints checking that you require, 
and can be used in conjunction with other schema languages. For 
example the topologi schema tool [3] is capable of taking a W3C XML 
Schema which contains embedded Schematron rules and applying 
both sets of constraints.

Let me know if you need any help.

Cheers,

L.

[1]. http://www.ascc.net/xml/resource/schematron/schematron.html
[2]. http://www.bath.ac.uk/~ccslrd/papers/schematron_xsltuk.html
[3]. http://www.topologi.com


-- 
Leigh Dodds, Research Group, Ingenta | "Pluralitas non est ponenda
http://weblogs.userland.com/eclectic |    sine necessitate"
http://www.xml.com/pub/xmldeviant    |     -- William of Ockham