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On Jul 28, 2004, at 1:03 PM, Dan White wrote:
> I need to be able to validate this:
> The value of "degrees" can be 90 only if "minutes" and "seconds" are
> zero. A degee value of 90 with non-zero minutes or seconds is invalid.
> That's the main problem. I have to allow for someone referencing the
> North/South Pole or , in the case of Longitude, the International
> (180 degrees longitude)
> Both present the same problem.
Ah... you need cross-field validation. XML Schema doesn't support that
You can do this with schematron--which is completely complimentary to
XML Schema. That
is, it is another validation layer for your document.
Alex Milowski FAX: (707) 598-7649
"The excellence of grammar as a guide is proportional to the paucity of
inflexions, i.e. to the degree of analysis effected by the language
Bertrand Russell in a footnote of Principles of Mathematics