YAZ_CHECK(record_assign_sortkey(nmem, record, service, "relevance", data_text));
YAZ_CHECK(record_assign_sortkey(nmem, record, service, "title", data_text));
YAZ_CHECK(record_assign_sortkey(nmem, record, service, "relevance", data_text));
YAZ_CHECK(record_assign_sortkey(nmem, record, service, "title", data_text));