[xml] why xmlNodeSet in xpath and xpathInternal?

[Kang Jeong-Hee <Keizi mail co kr>]

Hi.

implementing NamedNodeMap and NodeList for http://gybe.sf.net/dominigue/,
finally found xmlNodeSet is already implemented in libxml.
libxml is likewise a good friend of xml world. :)

but, xmlNodeSet and its APIs are spread over xpath and xpathInternal.
I don't know what's difference between xpath and Internal.
but why in xpath, not in tree?
after brief eye-rolling, xmlNodeSet APIs do not invoke xpath-something,
does it?

thx