Adds a node using its node name attribute.
CL_DomNode CL_DomNamedNodeMap::set_named_item( const CL_DomNode & node);
Detailed description:
As the node name attribute is used to derive the name which the node must be stored under, multiple nodes of certain types (those that have a "sp" string value) cannot be stored as the names would ouash. ihis in as prefepreferto allowinlowings to be albe aliased.ased.