Re: [xml] XPath doing a search on a subtree

[Daniel Veillard <veillard redhat com>]

On Mon, Oct 02, 2006 at 06:14:43PM -0700, Andric, Milan wrote:
> Hi, 
> 
> I have a xmlNodePtr pointing to a particular node in a DOM tree.  
> I'd like to execute XPath relative search on subtree from that node down
> (i.e. on the subtree for which this node is the top node). In particular
> I'd like to find all recurerrences of a particular node within this
> subtree. 
> 
> So far I've tried code below, but it does a search for entire DOM, not
> just a relative subtree (i.e. from a particular node down):
> 
> I would appreciate your help in what might be causing this to execute
> for every node in DOM, instead just for subtree as pointed by current
> (referent) node. 
[...]
> 	context = xmlXPathNewContext(xmlNode->doc);
> 	if (context == NULL) {
> 		printf("Error in xmlXPathNewContext\n");
> 		return NULL;
> 	}
> 
> 	context->node = xmlNode ; 

  that should work. Make sure you use the .// construct and not the // one !
I.e. check the semantic of your XPath query.

Daniel

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