diff --git a/src/yang/etsi-nfv-common.yang b/src/yang/etsi-nfv-common.yang
index dc28e78c3c44ff20d96c196f2a1ae12d90883442..e0921af45a76f7cee6d017bfb45dacca92c9ae59 100644
--- a/src/yang/etsi-nfv-common.yang
+++ b/src/yang/etsi-nfv-common.yang
@@ -9,6 +9,15 @@ submodule etsi-nfv-common {
   description
     "Common data types for ETSI data models.";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       Common data structures to support VNFD and NSD according to:
+       ETSI GS NFV-IFA 014 271
+       ETSI GS NFV-IFA 011 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
diff --git a/src/yang/etsi-nfv-descriptors.yang b/src/yang/etsi-nfv-descriptors.yang
index 0f2b64c5e221287e18881fc661e6c50ad9f443b1..3b93f1287b36f105b99c9ceef0dac8ba46b42fb5 100644
--- a/src/yang/etsi-nfv-descriptors.yang
+++ b/src/yang/etsi-nfv-descriptors.yang
@@ -14,6 +14,14 @@ module etsi-nfv-descriptors {
   description
     "Network Function Virtualization Descriptors";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       NSD and PNFD according to ETSI GS NFV-IFA 014 271
+       VNFD according to ETSI GS NFV-IFA 011 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
@@ -24,6 +32,7 @@ module etsi-nfv-descriptors {
   revision 2019-04-25 {
     description
       "Initial revision.
+
        NSD and PNFD according to ETSI GS NFV-IFA 014 Ed261v252
        VNFD according to ETSI GS NFV-IFA 011 Ed261v254";
   }
diff --git a/src/yang/etsi-nfv-ns.yang b/src/yang/etsi-nfv-ns.yang
index 303a525df72992d18be3b14084ea2ad5ad23380e..c096d1e65aa7d6906dddc46ea317774b01ec4638 100644
--- a/src/yang/etsi-nfv-ns.yang
+++ b/src/yang/etsi-nfv-ns.yang
@@ -11,19 +11,25 @@ submodule etsi-nfv-ns {
   description
     "Models for NS according to ETSI GS NFV-IFA 014.";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       NSD according to ETSI GS NFV-IFA 014 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
 
-       Common data structures to support VNFD and NSD according to:
-       ETSI GS NFV-IFA 014 Ed271v264
-       ETSI GS NFV-IFA 011 Ed271v264";
+       NSD according to ETSI GS NFV-IFA 014 Ed271v264.";
   }
+
   revision 2019-04-25 {
     description
       "Initial revision
-       Common data structure to support NSD according to:
-       ETSI GS NFV-IFA 014 Ed261v252";
+
+       NSD according to ETSI GS NFV-IFA 014 Ed261v252.";
 
     reference
       "ETSI GS NFV-IFA 014 Ed261v252";
diff --git a/src/yang/etsi-nfv-nsd.yang b/src/yang/etsi-nfv-nsd.yang
index 0175854eb6ce811c9e37cb5a7869cc61f0d87af6..c23e31c06f243d419007419dd13e92ff89d793e2 100644
--- a/src/yang/etsi-nfv-nsd.yang
+++ b/src/yang/etsi-nfv-nsd.yang
@@ -13,17 +13,24 @@ module etsi-nfv-nsd {
   description
     "Network Services Descriptors";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       NSD according to ETSI GS NFV-IFA 014 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
 
-       Common data structures to support VNFD and NSD according to:
-       ETSI GS NFV-IFA 014 Ed271v264
-       ETSI GS NFV-IFA 011 Ed271v264";
+       NSD according to ETSI GS NFV-IFA 014 Ed271v264.";
   }
+
   revision 2019-04-25 {
     description
       "Initial revision.
+
        NSD according to ETSI GS NFV-IFA 014 Ed261v252.";
   }
 
diff --git a/src/yang/etsi-nfv-pnf.yang b/src/yang/etsi-nfv-pnf.yang
index 170e9638b87a37dba4fe7599d1bb97ed0d4c3c2b..aa1313e2aac4076c819b2c2c7fe2dad46113dce3 100644
--- a/src/yang/etsi-nfv-pnf.yang
+++ b/src/yang/etsi-nfv-pnf.yang
@@ -12,20 +12,25 @@ submodule etsi-nfv-pnf {
   description
     "Models for PNFD according to GS NFV-IFA 014.";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       PNFD according to ETSI GS NFV-IFA 014 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
 
-       Common data structures to support VNFD and NSD according to:
-       ETSI GS NFV-IFA 014 Ed271v264
-       ETSI GS NFV-IFA 011 Ed271v264";
+       PNFD according to ETSI GS NFV-IFA 014 Ed271v264.";
   }
+
   revision 2019-04-25 {
     description
       "Initial revision.
 
-       Common data structure to support VNFD according to:
-       ETSI GS NFV-IFA 014 Ed261v252";
+       PNFD according to ETSI GS NFV-IFA 014 Ed261v252.";
 
     reference
       "ETSI GS NFV-IFA 014 Ed261v252";
diff --git a/src/yang/etsi-nfv-pnfd.yang b/src/yang/etsi-nfv-pnfd.yang
index 8b3e46ebd17181c3e4ccd1b2dfd03817479e302a..66147c9a6de2f2437fd90c112e2d57324c4c1b6d 100644
--- a/src/yang/etsi-nfv-pnfd.yang
+++ b/src/yang/etsi-nfv-pnfd.yang
@@ -13,15 +13,24 @@ module etsi-nfv-pnfd {
   description
     "Physcial Network Function Descriptor.";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       PNFD according to ETSI GS NFV-IFA 014 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
 
        NSD according to ETSI GS NFV-IFA 014 Ed271v264.";
   }
+
   revision 2019-04-25 {
     description
       "Initial revision.
+
        NSD according to ETSI GS NFV-IFA 014 Ed261v252.";
   }
 
diff --git a/src/yang/etsi-nfv-vnf.yang b/src/yang/etsi-nfv-vnf.yang
index ef91949cc74009f60ea6d5bbdfb7f74f1d7dd93a..16f77c98637e3950e3bbbb4813620a5eece43ebe 100755
--- a/src/yang/etsi-nfv-vnf.yang
+++ b/src/yang/etsi-nfv-vnf.yang
@@ -16,19 +16,24 @@ submodule etsi-nfv-vnf {
   description
     "Models for VNFD according to GS NFV-IFA 011.";
 
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       VNFD according to ETSI GS NFV-IFA 011 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Version 2.7.1.
 
-       Common data structures to support VNFD and NSD according to:
-       ETSI GS NFV-IFA 014 Ed271v264
-       ETSI GS NFV-IFA 011 Ed271v264";
+       VNFD according to ETSI GS NFV-IFA 011 Ed271v264";
   }
+
   revision 2019-03-18 {
     description
       "Initial revision.
 
-       Common data structure to support VNFD according to:
        VNFD according to ETSI GS NFV-IFA 011 Ed261v254";
 
     reference
diff --git a/src/yang/etsi-nfv-vnfd.yang b/src/yang/etsi-nfv-vnfd.yang
index f5fcc6282c69ff9dbc8054d2af0bea71bbc4fd58..279dfbab2e527b479ad1b879943fee82b23f8f75 100644
--- a/src/yang/etsi-nfv-vnfd.yang
+++ b/src/yang/etsi-nfv-vnfd.yang
@@ -13,15 +13,24 @@ module etsi-nfv-vnfd {
   description
     "Virtual Network Function Descriptor.";
   
+  revision 2020-06-01 {
+    description
+      "Version 2.8.1.
+
+       VNFD according to ETSI GS NFV-IFA 011 271.";
+  }
+
   revision 2019-10-01 {
     description
       "Revision 2.7.1.
       
        VNFD according to ETSI GS NFV-IFA 011 Ed271v264.";
   }
+
   revision 2019-03-18 {
     description
       "Initial revision.
+
        VNFD according to ETSI GS NFV-IFA 011 Ed261v254.";
   }