[Expat-discuss] Refering to XML Schema and Expat

[Karl Waclawek]

> But beside the deficiencies of my code, I should mention, that I
> think, it's not possible, to write a 100 percent compliant DTD
> validator on top of the current expat code. There are two major
> problems, I see: It is not possible at the moment, to check for the
> Validity constraint: Proper Declaration/PE Nesting, and second it is
> not possible, to validate XML documents, that have standalone="yes"
> and an external subset (the problem is, that there is no reliable way
> to know, if expat has done additional normalization on attribute
> types other than CDATA (see XML rec 3.3.3). If somebody is interested,
> I may elaborate this notes a bit more.

Please do - on both points!

Karl