+rng = \
+filter_auth_simple.rng \
+filter_backend_test.rng \
+filter_bounce.rng \
+filter_cgi.rng \
+filter_cql_rpn.rng \
+filter_frontend_net.rng \
+filter_http_file.rng \
+filter_limit.rng \
+filter_load_balance.rng \
+filter_log.rng \
+filter_multi.rng \
+filter_query_rewrite.rng \
+filter_record_transform.rng \
+filter_session_shared.rng \
+filter_sru_z3950.rng \
+filter_virt_db.rng \
+filter_z3950_client.rng \
+filter_zoom.rng \
+metaproxy.rng \
+retrievalinfo.rng