Extend set of builtin XPath functions

[Paul Kinnucan <pa...@mathworks.com>]

Hi,

Is it possible to add to the set of XPath functions supported by Xalan-C++ without modifying Xalan-C++ itself?

I would like to add a matches function and possibly other functions provided by other XPath implementations but not by Xalan.

I have tried using the  XPath::installFunction static method but this method ignores a function if it is not a built-in function.

I have tried adding a matches function to a XalanTransformer object using the procedure documented here:

http://xml.apache.org/xalan-c/extensions.html

but this seems to work only if the extension function is invoked in an XSLT template.

Am I missing something or is it that Xalan-C++ does not permit extending its set of XPath functions?

Regards,

Paul