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It sounds like they're pretty much competing technologies where you use either one or the other but not necessarily both.
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No, that's not what I meant to imply. Arrggh.

I answered the way I did because most Xbase developers start using schema because they are required to, by an external partner.

If you are defining the requirements here, there is no question about it: you should use XSD.

You can*also* create a more-or-less equivalent DTD for the use of anybody who would like to have it and who does not yet support XSDs.

The DTD is roughly equivalent to a translation of your published novel <s>. It serves as a reasonable facsimile for people who can't read the original.

But your standard for your own internal validation as well as for publication of your messaging requirements would be the XSD.

They are not "competing technologies". This is a question of chronology in the development of technology, not competition.

HTH,

>L<