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

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

        :param log_id: the ``Id`` of a ``Log``
        :type log_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`` -- ``log_id`` not found
        :raise: ``NullArgument`` -- ``log_id`` or ``alias_id`` is ``null``
        :raise: ``OperationFailed`` -- unable to complete request
        :raise: ``PermissionDenied`` -- authorization failure

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