Add a new metric.
diff --git a/oal-parser/src/test/resources/oal_test.oal b/oal-parser/src/test/resources/oal_test.oal
index ccb285a..da37d26 100644
--- a/oal-parser/src/test/resources/oal_test.oal
+++ b/oal-parser/src/test/resources/oal_test.oal
@@ -43,6 +43,7 @@
 service_relation_server_resp_time = from(ServiceRelation.latency).filter(detectPoint == DetectPoint.SERVER).longAvg();
 
 // Service Instance Scope metric
+service_instance_sla = from(ServiceInstance.*).percent(status == true);
 service_instance_resp_time= from(ServiceInstance.latency).longAvg();
 service_instance_cpm = from(ServiceInstance.*).cpm();