@abc.abstractmethod<EOL><INDENT>def alias_resource_relationship(self, resource_relationship_id, alias_id):<DEDENT>
pass<EOL>
Adds an ``Id`` to a ``ResourceRelationship`` for the purpose of creating compatibility.

        The primary ``Id`` of the ``ResourceRelationship`` is determined
        by the provider. The new ``Id`` performs as an alias to the
        primary ``Id`` . If the alias is a pointer to another resource
        relationshp, it is reassigned to the given resource relationship
        ``Id``.

        :param resource_relationship_id: the ``Id`` of a ``ResourceRelationship``
        :type resource_relationship_id: ``osid.id.Id``
        :param alias_id: the alias ``Id``
        :type alias_id: ``osid.id.Id``
        :raise: ``AlreadyExists`` -- ``alias_id`` is already assigned
        :raise: ``NotFound`` -- ``resource_relationship_id`` not found
        :raise: ``NullArgument`` -- ``resource_relationship_id`` or ``alias_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

        *compliance: mandatory -- This method must be implemented.*