Internal subset equivalent in new schema proposals?

[Joel Bender]

Ketil Z Malde wrote:

>  What could be useful and relatively simple, is a restriction
>  of the *form* of the data, e.g. forcing the <name type="city">
>  to contain only letters and start with a capital, or LC
>  subjects to be two upper case letters (if that's what they are).
>  Phone numbers, dates, sort keys, there are many cases where it
>  would be helpful to have the parser catch these things, I think.

I was thinking along similar lines.  I've been adding something like this
to my XML documents:

	<prop name="state" xml:regexp="[A-Z]+">NY</prop>

So the parser can verify that the CDATA matches the regular expression.
Works OK for content, but I don't see how I can add this meta-meta-data for
attributes.  That is to say, how can I tell the parser that the 'name'
attribute value for the 'prop' entity must be of the form
"[a-zA-Z_][0-9a-zA-Z_]*"?

Of course this also brings up the murky waters of grep syntax, which I've
been avoiding.


Joel

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at ic.ac.uk
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/
To (un)subscribe, mailto:majordomo at ic.ac.uk the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at ic.ac.uk the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at ic.ac.uk)