SOL005_101: filter description updated in GET Subscriptions

src/SOL005/NSPerformanceManagement/NSPerformanceManagement.yaml

@@ -981,12 +981,11 @@ paths:
           required: false
           type: string
           description: >
-            Attribute-based filtering parameters according to clause 4.3.2.
-            The NFVO shall support receiving filtering parameters as part of the URI
-            query string. The OSS/BSS may supply filtering parameters.
-            All attribute names that appear in the PmSubscription and in data types
-            referenced from it shall be supported in attribute-based filtering
-            parameters.
+            Attribute-based filtering expression according to clause 4.3.2.
+            The NFVO shall support receiving this parameter as part of the URI query string.
+            The OSS/BSS may supply this parameter.
+            All attribute names that appear in the PmSubscription and in data types referenced from it
+            shall be supported by the NFVO in the filter expression. 
         - name: nextpage_opaque_marker
           in: query
           required: false