diff --git a/src/yang/etsi-nfv-common.yang b/src/yang/etsi-nfv-common.yang
index a8eef0d9466a44cc2268cd410308821518fd9549..2397d8a40e6563a22c05a06150e97f8bd3a27301 100644
--- a/src/yang/etsi-nfv-common.yang
+++ b/src/yang/etsi-nfv-common.yang
@@ -16,6 +16,15 @@ submodule etsi-nfv-common {
   description
     "Common data types for ETSI data models.";
 
+revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       Common data structures to support VNFD and NSD according to:
+       ETSI GS NFV-IFA 014 Release 3
+       ETSI GS NFV-IFA 011 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-descriptors.yang b/src/yang/etsi-nfv-descriptors.yang
index fc51fbfcb196e2d2c7fd3712fdc930d8a0c90277..af5b78cb164f8872754b9590eb99e1bd042585b3 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 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       NSD and PNFD according to ETSI GS NFV-IFA 014 Release 3
+       VNFD according to ETSI GS NFV-IFA 011 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-ns.yang b/src/yang/etsi-nfv-ns.yang
index ae3cf1e19736251f9752643d0b817312bbeb70d5..a29a26e8a1740ebd002dad46a3aa4764428dbdc5 100644
--- a/src/yang/etsi-nfv-ns.yang
+++ b/src/yang/etsi-nfv-ns.yang
@@ -11,6 +11,13 @@ submodule etsi-nfv-ns {
   description
     "Models for NS according to ETSI GS NFV-IFA 014.";
 
+  revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       NSD according to ETSI GS NFV-IFA 014 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-nsd.yang b/src/yang/etsi-nfv-nsd.yang
index 8c9f21b4d160536cb24298defc3127f0aba01173..f78dbb34f06d326ad148c7d63b134b529a73177d 100644
--- a/src/yang/etsi-nfv-nsd.yang
+++ b/src/yang/etsi-nfv-nsd.yang
@@ -13,6 +13,13 @@ module etsi-nfv-nsd {
   description
     "Network Services Descriptors";
 
+  revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       NSD according to ETSI GS NFV-IFA 014 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-pnf.yang b/src/yang/etsi-nfv-pnf.yang
index a24746c4f24414b0cf80b553ec837926e2a83276..764c8074bac91ccf24a37ad3cd291860ece1dc52 100644
--- a/src/yang/etsi-nfv-pnf.yang
+++ b/src/yang/etsi-nfv-pnf.yang
@@ -12,6 +12,14 @@ submodule etsi-nfv-pnf {
   description
     "Models for PNFD according to GS NFV-IFA 014.";
 
+ revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       PNFD according to ETSI GS NFV-IFA 014 Release 3.";
+  }
+
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-pnfd.yang b/src/yang/etsi-nfv-pnfd.yang
index c79d6b9c19ec5752f29bf5c97f7fef32fff9e967..a9edfd09afd84fbf3197932a7cd23664b9210587 100644
--- a/src/yang/etsi-nfv-pnfd.yang
+++ b/src/yang/etsi-nfv-pnfd.yang
@@ -13,6 +13,13 @@ module etsi-nfv-pnfd {
   description
     "Physcial Network Function Descriptor.";
 
+revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       PNFD according to ETSI GS NFV-IFA 014 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-vnf.yang b/src/yang/etsi-nfv-vnf.yang
index 843a49eb4bc248ac7e7553ce8f6764e8449e4473..76f1da214d354a1154eefec7ae618ee163f07fb4 100755
--- a/src/yang/etsi-nfv-vnf.yang
+++ b/src/yang/etsi-nfv-vnf.yang
@@ -16,6 +16,14 @@ submodule etsi-nfv-vnf {
   description
     "Models for VNFD according to GS NFV-IFA 011.";
 
+ revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       Data structures to support VNFD according to
+       ETSI GS NFV-IFA 011 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.
diff --git a/src/yang/etsi-nfv-vnfd.yang b/src/yang/etsi-nfv-vnfd.yang
index 25bff84f0d7e026b02078b1f2d60162bae4680d2..a3c80daa88e4973b502c3d5779b89760e43e41b2 100644
--- a/src/yang/etsi-nfv-vnfd.yang
+++ b/src/yang/etsi-nfv-vnfd.yang
@@ -12,7 +12,14 @@ module etsi-nfv-vnfd {
 
   description
     "Virtual Network Function Descriptor.";
-  
+
+   revision 2021-07-05 {
+    description
+      "Version 3.5.1.
+
+       VNFD according to ETSI GS NFV-IFA 011 Release 3.";
+  }
+
   revision 2020-06-10 {
     description
       "Version 3.3.1.