Hi all,

Seeing the XML 1.0, 5th edition spec (ref, http://www.w3.org/TR/REC-xml/) I cannot find any reference to the phrase "XML Schema" or XSD (which are the XML Schema languages, defined by the W3C specs viz specified at, http://www.w3.org/XML/Schema).

The XML 1.0 spec, certainly refers to the word DTD and provides the complete definition of DTD semantics, and how it integrates with XML as a validation technology. This all is great.

But I wonder, why the XML spec (1.0 or 1.1) doesn't mention XSD (i.e, W3C XML Schema language) as also a second XML validation language (i.e, other than DTD)? I am curious to know, was this decision not to mention XSD as a validation technology in XML specs, was a consicous one? If yes, what advantages we have achieved by this decision?

This curiousity spurs to my mind, keeping in mind that XSD is a very important XML validation technology today, which is a W3C standard and implemented widely in software applications.

-- Regards, Mukul Gandhi

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