+=item C<default_part_id>
+
+An optional part id which is used as default value if no part is set
+in the time recording entry.
+
+=item C<default_partnumber>
+
+Like C<default_part_id> but given as partnumber, not as id.
+
+=item C<override_part_id>
+
+An optional part id which is used instead of a value set in the time
+recording entry.
+
+=item C<override_partnumber>
+
+Like C<overrride_part_id> but given as partnumber, not as id.
+