Daniel Veillard wrote: > On Fri, Mar 16, 2007 at 09:03:01AM -0500, Ethan Metsger wrote:
[snip] > > shed some light on how xmlXPathEval differs from xmlXPathEvalExpression, > > and whether the issue is related to the context passed? This seems to be something of an FAQ around here. It would be useful for the documentation of these functions to document how they differ, possibly with a reference to the XPath spec. Maybe some kind soul reading this thread can find the time to prepare a patch. I don't have time right now. > Use xmlXPathEval(), see XPath spec to see the real difference: > http://www.w3.org/TR/xpath#NT-LocationPath > [1] LocationPath > > http://www.w3.org/TR/xpath#NT-Expr > [14] Expr So the difference is that xmlXPathEvalExpression handles an XPath "Expr", whereas xmlXPathEval handles an XPath "Location Path", which is a particular kind of Expr. In other words: xmlXPathEvalExpression should be able to handle any expression that xmlXPathEval can, and a number more. (In http://mail.gnome.org/archives/xml/2001-July/msg00102.html you appeared to agree with Wai-Sun Chia that they are functionally identical.) Is there a reason for advocating using the function that is documented as less powerful? Certainly in the code I have that uses libxml2, I want to be able to evaluate any Expr, not only LocationPath expressions. -- James _______________________________________________ xml mailing list, project page http://xmlsoft.org/ [email protected] http://mail.gnome.org/mailman/listinfo/xml
