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   Re: [xml-dev] We need SAX features to say a parser supports XML 1.1

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** Reply to message from Eric van der Vlist <vdv@dyomedea.com> on 25 Oct 2002
12:34:10 +0200

> > > I guess we will be needing SAX properties to handle
> > > XML 1.1.


> I am wondering if it could be usefull to separate these features from
> the actual XML declaration and indicate if the XML document has actually
> used XML 1.1 features.

Do mean whether any XML document has used 1.1 features, or just whether any
version="1.1" XML document has used >1.0 features?  Auto-reporting of the
effective XML version would be interesting to some users, but it would bring
into question the original idea that an XML document without an <?xml ...?>
declaration, or without an explicit version, is a 1.0 document.

That said, I'm disinclined to go for features which designed to support version
coercion.  My socio-political argument is that If someone sends you a 1.1
document today, it might be a valid 1.0 document too, but there is an implicit
message that future documents will be 1.1, and may use 1.1 features.  If someone
wants to send the signal that 1.1 features will never be used, they should just
send you an explicit 1.0 documents.  I don't think that any other approach would
lead to a robust process.

Anthony B. Coates, Information & Software Architect
MDDL Editor (Market Data Definition Language)


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