kj scribbled something along the lines of:
> The main rationale I have seen for namespace support in XML is to
> enable the peaceful coexistence of XML fragments from various
> sources within the same ("heterogeneous") XML document without
> their trampling over each other's namespaces.
>
> What about the validation of such "heterogeneous" XML documents?
>
> Not only are various fragments probably governed by different
> syntaxes, but these syntaxes are probably specified using different
> languages (DTDs, XML Schema, etc.).
>
> How are all these competing standards and diverse syntatic
> specifications brought together to validate a heterogeneous XML
> document?
>
> Thanks!
>
> kj
The only way to get them DTD valid is to use a DTD which is made for the
chosen combination (XHTML + MathML or so is such a DTD, another one is
XHTML + MathML + SVG), although these usually specify a prefix you have
to use.
The better solution is to use only schemas. The only standardized way to
link a namespace to a schema the W3C has brought up so far is the
schemaLocation attribute. According to the specs that one only
*suggests* a schema tho, it doesn't directly bind it to the namespace.
I personally think a PI or similar would be a better choice, same goes
for entity definition lists (there was a thread on this issue on
www-)...
--
Alan Plum, WAD/WD, Mushroom Cloud Productions
http://www.mushroom-cloud.com/
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