( unknown )
This node will not show up in the document unless it is inserted with e.g . DomNode_append_child( ) .
The return value is false if an error occured .
See also DomNode_append_child( ) , DomDocument_create_text( ) , DomDocument_create_comment( ) , DomDocument_create_attribute( ) , DomDocument_create_processing_instruction( ) , DomDocument_create_entity_reference( ) , DomNode_insert_before( ) .