or PI
nodes. For element and attribute nodes, removes all
children and replaces them by parsing content which is
expected to be a valid XML attribute value possibly
containing character and entity references. Syntax errors
and references to undeclared entities are ignored silently.
Unfortunately, there isn't an API to pass raw content
directly. An inefficient work-around is to escape the
content with xmlEncodeSpecialChars before passing it. A
better trick is clearing the old content with
xmlNodeSetContent(node, None) first and then calling
xmlNodeAddContent(node, content) . Unlike this function,
 xmlNodeAddContent accepts raw text. )