[xml] Validating XML Expressions

[Gnushi <gnushi gmx net>]

Hi Folks!

I would like to know wether there are functions to validate xml
expressions like URIs, namespaces, IDs, just qualified XML names
against the W3 standard. Something like

int isValidID(const xmlChar* id);

which can be used for expression like
<foo ID=" my id" />

if isValidID(" my id")....

I did not find anything in the mailing list archive and the documentation.

Best regards

GnuShi