diff --git a/models/tapi/src/main/java/org/onosproject/models/tapi/TapiModelRegistrator.java b/models/tapi/src/main/java/org/onosproject/models/tapi/TapiModelRegistrator.java
index 15fb319..c4f1550 100644
--- a/models/tapi/src/main/java/org/onosproject/models/tapi/TapiModelRegistrator.java
+++ b/models/tapi/src/main/java/org/onosproject/models/tapi/TapiModelRegistrator.java
@@ -22,11 +22,11 @@
 import com.google.common.collect.ImmutableMap;
 import org.osgi.service.component.annotations.Component;
 import org.onosproject.yang.AbstractYangModelRegistrator;
-import org.onosproject.yang.gen.v1.tapicommon.rev20181016.TapiCommon;
-import org.onosproject.yang.gen.v1.tapiconnectivity.rev20181016.TapiConnectivity;
-import org.onosproject.yang.gen.v1.tapipathcomputation.rev20181016.TapiPathComputation;
-import org.onosproject.yang.gen.v1.tapiphotonicmedia.rev20181016.TapiPhotonicMedia;
-import org.onosproject.yang.gen.v1.tapitopology.rev20181016.TapiTopology;
+import org.onosproject.yang.gen.v1.tapicommon.rev20181210.TapiCommon;
+import org.onosproject.yang.gen.v1.tapiconnectivity.rev20181210.TapiConnectivity;
+import org.onosproject.yang.gen.v1.tapipathcomputation.rev20181210.TapiPathComputation;
+import org.onosproject.yang.gen.v1.tapiphotonicmedia.rev20181210.TapiPhotonicMedia;
+import org.onosproject.yang.gen.v1.tapitopology.rev20181210.TapiTopology;
 import org.onosproject.yang.model.DefaultYangModuleId;
 import org.onosproject.yang.model.YangModuleId;
 import org.onosproject.yang.runtime.AppModuleInfo;
diff --git a/models/tapi/src/main/yang/tapi-common@2018-10-16.yang b/models/tapi/src/main/yang/tapi-common@2018-12-10.yang
similarity index 94%
rename from models/tapi/src/main/yang/tapi-common@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-common@2018-12-10.yang
index d526a7a..b5fecaa 100755
--- a/models/tapi/src/main/yang/tapi-common@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-common@2018-12-10.yang
@@ -10,23 +10,29 @@
     description "
         This module contains TAPI Common Model definitions.
         Source: TapiCommon.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
-        License: This module is distributed under the Apache License 2.0
-        ";
+        License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-connectivity@2018-10-16.yang b/models/tapi/src/main/yang/tapi-connectivity@2018-12-10.yang
similarity index 94%
rename from models/tapi/src/main/yang/tapi-connectivity@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-connectivity@2018-12-10.yang
index 755eb2e..5b798c7 100755
--- a/models/tapi/src/main/yang/tapi-connectivity@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-connectivity@2018-12-10.yang
@@ -19,22 +19,29 @@
     description "
         This module contains TAPI Connectivity Model definitions.
         Source: TapiConnectivity.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-dsr@2018-10-16.yang b/models/tapi/src/main/yang/tapi-dsr@2018-12-10.yang
similarity index 76%
rename from models/tapi/src/main/yang/tapi-dsr@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-dsr@2018-12-10.yang
index 545f585..77f5a8b 100755
--- a/models/tapi/src/main/yang/tapi-dsr@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-dsr@2018-12-10.yang
@@ -10,21 +10,32 @@
          Project List: <mailto:transport-api@opennetworking.org>
          Editor: Karthik Sethuraman
                  <mailto:karthik.sethuraman@necam.com>";
-    description "none";
+    description "
+        This module contains TAPI DSR Model definitions.
+        Source: TapiDsr.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
+        Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
+        License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-eth@2018-10-16.yang b/models/tapi/src/main/yang/tapi-eth@2018-12-10.yang
similarity index 97%
rename from models/tapi/src/main/yang/tapi-eth@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-eth@2018-12-10.yang
index 383558e..953affa 100755
--- a/models/tapi/src/main/yang/tapi-eth@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-eth@2018-12-10.yang
@@ -21,22 +21,29 @@
                  <mailto:karthik.sethuraman@necam.com>";
     description "This module contains TAPI ETH Model definitions.
         Source: TapiEth.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-notification@2018-10-16.yang b/models/tapi/src/main/yang/tapi-notification@2018-12-10.yang
similarity index 90%
rename from models/tapi/src/main/yang/tapi-notification@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-notification@2018-12-10.yang
index 2885abc..28071af 100755
--- a/models/tapi/src/main/yang/tapi-notification@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-notification@2018-12-10.yang
@@ -13,22 +13,29 @@
     description "
         This module contains TAPI Notification Model definitions.
         Source: TapiNotification.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-oam@2018-10-16.yang b/models/tapi/src/main/yang/tapi-oam@2018-12-10.yang
similarity index 93%
rename from models/tapi/src/main/yang/tapi-oam@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-oam@2018-12-10.yang
index 143b790..5410ba4 100755
--- a/models/tapi/src/main/yang/tapi-oam@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-oam@2018-12-10.yang
@@ -19,22 +19,29 @@
     description "
         This module contains TAPI OAM Model definitions.
         Source: TapiOam.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-odu@2018-10-16.yang b/models/tapi/src/main/yang/tapi-odu@2018-12-10.yang
similarity index 94%
rename from models/tapi/src/main/yang/tapi-odu@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-odu@2018-12-10.yang
index d927fdd..8d104b9 100755
--- a/models/tapi/src/main/yang/tapi-odu@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-odu@2018-12-10.yang
@@ -25,22 +25,29 @@
     description "
         This module contains TAPI Odu Model definitions.
         Source: TapiOdu.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-path-computation@2018-10-16.yang b/models/tapi/src/main/yang/tapi-path-computation@2018-12-10.yang
similarity index 89%
rename from models/tapi/src/main/yang/tapi-path-computation@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-path-computation@2018-12-10.yang
index ba6173d..eeae3e2 100755
--- a/models/tapi/src/main/yang/tapi-path-computation@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-path-computation@2018-12-10.yang
@@ -16,22 +16,29 @@
     description "
         This module contains TAPI Path Computation Model definitions.
         Source: TapiPathComputation.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-photonic-media@2018-10-16.yang b/models/tapi/src/main/yang/tapi-photonic-media@2018-12-10.yang
similarity index 95%
rename from models/tapi/src/main/yang/tapi-photonic-media@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-photonic-media@2018-12-10.yang
index 5ae8fe1..dc69c76 100755
--- a/models/tapi/src/main/yang/tapi-photonic-media@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-photonic-media@2018-12-10.yang
@@ -19,22 +19,29 @@
     description "
         This module contains TAPI PhotonicMedia Model definitions.
         Source: TapiPhotonicMedia.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-topology@2018-10-16.yang b/models/tapi/src/main/yang/tapi-topology@2018-12-10.yang
similarity index 93%
rename from models/tapi/src/main/yang/tapi-topology@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-topology@2018-12-10.yang
index df459aa..0d35d85 100755
--- a/models/tapi/src/main/yang/tapi-topology@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-topology@2018-12-10.yang
@@ -13,22 +13,29 @@
     description "
         This module contains TAPI Topology Model definitions.
         Source: TapiTopology.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }
diff --git a/models/tapi/src/main/yang/tapi-virtual-network@2018-10-16.yang b/models/tapi/src/main/yang/tapi-virtual-network@2018-12-10.yang
similarity index 85%
rename from models/tapi/src/main/yang/tapi-virtual-network@2018-10-16.yang
rename to models/tapi/src/main/yang/tapi-virtual-network@2018-12-10.yang
index 8ab1bb4..e6ed244 100755
--- a/models/tapi/src/main/yang/tapi-virtual-network@2018-10-16.yang
+++ b/models/tapi/src/main/yang/tapi-virtual-network@2018-12-10.yang
@@ -16,22 +16,29 @@
     description "
         This module contains TAPI Virtual Network Model definitions.
         Source: TapiVirtualNetwork.uml
+        - The TAPI YANG models included in this TAPI release are a *normative* part of the TAPI SDK.
+        - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
+          <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
+          and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
+          <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
+        - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
+          As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
+        - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
+          The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
+          YANG models included in this release may not be backward compatible with previous TAPI releases.
         Copyright (c) 2018 Open Networking Foundation (ONF). All rights reserved.
         License: This module is distributed under the Apache License 2.0";
+    revision 2018-12-10 {
+        description "ONF Transport API version 2.1.1.
+                   Changes included in this TAPI release (v2.1.1) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.1.md>";
+        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
+                  <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
+    }
     revision 2018-10-16 {
         description "ONF Transport API version 2.1.0.
-          - The TAPI YANG models included in this TAPI release (v2.1.0) are a *normative* part of the TAPI SDK.
-          - The YANG specifications have been generated from the corresponding UML model using the [ONF EAGLE UML2YANG mapping tool]
-            <https://github.com/OpenNetworkingFoundation/EagleUmlYang>
-            and further edited manually to comply with the [ONF IISOMI UML2YANG mapping guidelines]
-            <https://wiki.opennetworking.org/display/OIMT/UML+-+YANG+Guidelines>
-          - Status of YANG model artifacts can be determined by referring to the corresponding UML artifacts.
-            As described in the UML models, some artifacts are considered *experimental*, and thus the corresponding YANG artifacts.
-          - The ONF TAPI release process does not guarantee backward compatibility of YANG models across major versions of TAPI releases.
-            The YANG model backward compatibility criteria are outlined in section 11 of <https://tools.ietf.org/html/rfc7950>.
-            YANG models included in this release are not backward compatible with previous TAPI releases.
-          - Changes included in this TAPI release (v2.1.0) are listed in
-            <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
+                   Changes included in this TAPI release (v2.1.0) are listed in
+                   <https://github.com/OpenNetworkingFoundation/TAPI/blob/develop/CHANGE_LOG/change-log.2.1.0.md>";
         reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 7950, RFC 6087 and ONF TAPI UML model
                   <https://github.com/OpenNetworkingFoundation/TAPI/tree/v2.1.0/UML>";
     }