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

[Martin Trappel <0xCDCDCDCD gmx at>]

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)

Thanks!
- Martin