CongXPathExpression
@congxpathexpression: the object which received the signal.
@obj:
@klass:
@obj:
@Returns:
@xpath_expression:
@doc:
@context_node:
@xpath_expression_string:
@Returns:
@doc:
@context_node:
@xpath_expression_string:
@Returns:
@xpath_expression:
@Returns:
@xpath_expression:
@Returns:
@xpath_expression:
@Returns: