Change-Id: I9e9a600819630d5a8499ad142756b86ba5e2fc1f
Issue-ID: VNFRQTS-577
Signed-off-by: Hagop Bozawglanian <hagop.bozawglanian@att.com>
 Relationship Types
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
-No requirements type is currently supported in ONAP.
+.. req::
+    :id: R-64064
+    :target: PNF
+    :keyword: MUST
+    :introduced: dublin
+
+    The PNFD provided by a PNF vendor **MUST** comply with the following
+    Relationship Types as specified in ETSI NFV-SOL001 standard:
+    
+      - tosca.datatypes.nfv.VirtualLinksTo
 
 
 Interface Types