Simple HREF for non-string and non-struct and non-array.
        Parameters:
            elt -- the DOM element being parsed
            ps -- the ParsedSoap object.
            tag --

def SimpleHREF(self, elt, ps, tag):
        '''Simple HREF for non-string and non-struct and non-array.
        Parameters:
            elt -- the DOM element being parsed
            ps -- the ParsedSoap object.
            tag -- 
        '''
        if len(_children(elt)): return elt
        href = _find_href(elt)
        if not href:
            if self.minOccurs is 0: return None
            raise EvaluateException('Required' + tag + ' missing',
                    ps.Backtrace(elt))
        return ps.FindLocalHREF(href, elt, 0)