+ bool send_z3950_present = true;
+
+ // recordXPath unsupported.
+ if (sr_req->recordXPath)
+ {
+ send_z3950_present = false;
+ yaz_add_srw_diagnostic(odr_en,
+ &(sru_pdu_res->u.response->diagnostics),
+ &(sru_pdu_res->u.response->num_diagnostics),
+ 72, 0);
+ }
+
+ // resultSetTTL unsupported.
+ // resultSetIdleTime in response
+ if (sr_req->resultSetTTL)
+ {
+ send_z3950_present = false;
+ yaz_add_srw_diagnostic(odr_en,
+ &(sru_pdu_res->u.response->diagnostics),
+ &(sru_pdu_res->u.response->num_diagnostics),
+ 50, 0);
+ }
+
+ // sort unsupported
+ if (sr_req->sort_type != Z_SRW_sort_type_none)
+ {
+ send_z3950_present = false;
+ yaz_add_srw_diagnostic(odr_en,
+ &(sru_pdu_res->u.response->diagnostics),
+ &(sru_pdu_res->u.response->num_diagnostics),
+ 80, 0);
+ }
+
+ // exit on all these above diagnostics
+ if (!send_z3950_present)
+ return false;
+
+