Re: [xml] xmlNodePtr valid after its document has been modified?

[Martin Trappel <0xCDCDCDCD gmx at>]

Daniel Veillard wrote:
> On Wed, Nov 05, 2008 at 04:56:11PM +0100, Martin Trappel wrote:
> > Hi all!
> >
> > a) Given a xmlNodePtr, is it still valid after modifying the document?
> > b) Given the xmlChar* Value of an attribute, is it still valid after  
> > modifying the node/document ?
> >
> > [code]
> > xmlDoc* doc;
> > ...
> > xmlNode* doc_node = (... obtain node of doc ...);
> > xmlChar* node_attrib_val = xmlGetProp(doc_node, "TEST");
> > ...
> > // Modify the doc, possibly adding and removing other nodes
> > ...
> > doc_node->... (Is the NodePtr still valid?)
> > ...
> > // Modify the node by adding or removing Attributes/Properties
> > ...
> > printf("%s", (const char*)node_attrib_value); // attribute value still  
> > valid??
> > [/code]
> >
> > Does libxml2 guarantee this? (v 2.6.27)
>
>   I think yes. The only danger I can think of is colapsing of adjacent
> text nodes, and namespace references, that's the only cases were a node
> not directly used in a tree modification may change or vanish due to
> the modification side effects,

Thank you. I was only thinking of Element Nodes and Attributes. (plus, I 
just saw that I've been actually using this all along without realizing 
it, so I should really be OK.)

cheers,
Martin