''

@expose_api
def show(self, trans, tag_name, **kwd):

    tag = self._get_item_tag_assoc(trans, self.tagged_item_class, kwd[self.tagged_item_id], tag_name)
    if (not tag):
        raise exceptions.ObjectNotFound('Failed    to    retrieve    specified    tag.')
    return self._api_value(tag, trans)
