[xslt] libxslt effects on _private member of libxml structures

[Sean McGuire <libxml particulate net>]

 From a quick look at the archives, I got the impression that libxslt 
will, in some cases, change the "_private" member of the libxml 
structures.  I'm wondering what cases it will do this in.

It seems to me it could change the value for things in the source 
document, the document describing the transformation, and/or the target 
document.  So what I'd like to know is, which of these will have their 
_private variable affected?

Thanks in advance,

-Sean