diff --git a/models/yang/vnfd-base.yang b/models/yang/vnfd-base.yang
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+
+/*
+ *
+ *   Copyright 2017 RIFT.IO Inc
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *   limitations under the License.
+ *
+ *
+ */
+
+module vnfd-base
+{
+  namespace "http://riftio.com/ns/riftware-1.0/vnfd-base";
+  prefix "vnfd-base";
+
+  import mano-types {
+    prefix "manotypes";
+  }
+
+  import ietf-inet-types {
+    prefix "inet";
+  }
+
+  revision 2017-02-28 {
+    description
+      "Initial revision. This YANG file defines
+       the common types for Virtual Network Function
+       (VNF) descriptor";
+    reference
+      "Derived from earlier versions of base YANG files";
+  }
+
+  grouping common-connection-point {
+    leaf name {
+      description "Name of the connection point";
+      type string;
+    }
+
+    leaf id {
+      description "Identifier for the internal connection points";
+      type string;
+    }
+
+    leaf short-name {
+      description "Short name to appear as label in the UI";
+      type string;
+    }
+
+    leaf type {
+      description "Type of the connection point.";
+      type manotypes:connection-point-type;
+    }
+
+    leaf port-security-enabled {
+      description "Enables the port security for the port";
+      type boolean;
+    }
+  }
+
+  typedef interface-type {
+    type enumeration {
+      enum INTERNAL;
+      enum EXTERNAL;
+    }
+  }
+
+  grouping virtual-interface {
+    container virtual-interface {
+      description
+          "Container for the virtual interface properties";
+
+      leaf type {
+        description
+            "Specifies the type of virtual interface
+             between VM and host.
+             VIRTIO          : Use the traditional VIRTIO interface.
+             PCI-PASSTHROUGH : Use PCI-PASSTHROUGH interface.
+             SR-IOV          : Use SR-IOV interface.
+             E1000           : Emulate E1000 interface.
+             RTL8139         : Emulate RTL8139 interface.
+             PCNET           : Emulate PCNET interface.
+             OM-MGMT         : Used to specify openmano mgmt external-connection type";
+
+        type enumeration {
+          enum OM-MGMT;
+          enum PCI-PASSTHROUGH;
+          enum SR-IOV;
+          enum VIRTIO;
+          enum E1000;
+          enum RTL8139;
+          enum PCNET;
+        }
+        default "VIRTIO";
+      }
+
+      leaf vpci {
+        description
+            "Specifies the virtual PCI address. Expressed in
+             the following format dddd:dd:dd.d. For example
+             0000:00:12.0. This information can be used to
+             pass as metadata during the VM creation.";
+        type string;
+      }
+
+      leaf bandwidth {
+        description
+            "Aggregate bandwidth of the NIC.";
+        type uint64;
+      }
+    }
+  }
+
+  grouping vnfd-descriptor {
+      leaf id {
+        description "Identifier for the VNFD.";
+        type string {
+          length "1..63";
+        }
+      }
+
+      leaf name {
+        description "VNFD name.";
+        mandatory true;
+        type string;
+      }
+
+      leaf short-name {
+        description "Short name to appear as label in the UI";
+        type string;
+      }
+
+      leaf vendor {
+        description "Vendor of the VNFD.";
+        type string;
+      }
+
+      leaf logo {
+        description
+            "Vendor logo for the Virtual Network Function";
+        type string;
+      }
+
+      leaf description {
+        description "Description of the VNFD.";
+        type string;
+      }
+
+      leaf version {
+        description "Version of the VNFD";
+        type string;
+      }
+
+      uses manotypes:vca-configuration;
+
+      container mgmt-interface {
+        description
+            "Interface over which the VNF is managed.";
+
+        choice endpoint-type {
+          description
+              "Indicates the type of management endpoint.";
+
+          case ip {
+            description
+                "Specifies the static IP address for managing the VNF.";
+            leaf ip-address {
+              type inet:ip-address;
+            }
+          }
+
+          case vdu-id {
+            description
+                "Use the default management interface on this VDU.";
+            leaf vdu-id {
+              type leafref {
+                path "../../vdu/id";
+              }
+            }
+          }
+
+          case cp {
+            description
+                "Use the ip address associated with this connection point.";
+            leaf cp {
+              type leafref {
+                path "../../connection-point/name";
+              }
+            }
+          }
+        }
+
+        leaf port {
+          description
+              "Port for the management interface.";
+          type inet:port-number;
+        }
+
+        container dashboard-params {
+          description "Parameters for the VNF dashboard";
+
+          leaf path {
+            description "The HTTP path for the dashboard";
+            type string;
+          }
+
+          leaf https {
+            description "Pick HTTPS instead of HTTP , Default is false";
+            type boolean;
+          }
+
+          leaf port {
+            description "The HTTP port for the dashboard";
+            type inet:port-number;
+          }
+        }
+      }
+
+      list internal-vld {
+        key "id";
+        description
+          "List of Internal Virtual Link Descriptors (VLD).
+          The internal VLD describes the basic topology of
+          the connectivity such as E-LAN, E-Line, E-Tree.
+          between internal VNF components of the system.";
+
+        leaf id {
+          description "Identifier for the VLD";
+          type string;
+        }
+
+        leaf name {
+          description "Name of the internal VLD";
+          type string;
+        }
+
+        leaf short-name {
+          description "Short name to appear as label in the UI";
+          type string;
+        }
+
+        leaf description {
+          type string;
+        }
+
+        leaf type {
+          type manotypes:virtual-link-type;
+        }
+
+        leaf root-bandwidth {
+          description
+              "For ELAN this is the aggregate bandwidth.";
+          type uint64;
+        }
+
+        leaf leaf-bandwidth {
+          description
+              "For ELAN this is the bandwidth of branches.";
+          type uint64;
+        }
+
+        list internal-connection-point {
+          key "id-ref";
+          description "List of internal connection points in this VLD";
+          leaf id-ref {
+            description "reference to the internal connection point id";
+            type leafref {
+              path "../../../vdu/internal-connection-point/id";
+            }
+          }
+        }
+
+        uses manotypes:provider-network;
+        choice init-params {
+          description "Extra parameters for VLD instantiation";
+
+          case vim-network-ref {
+            leaf vim-network-name {
+              description
+                  "Name of network in VIM account. This is used to indicate
+                    pre-provisioned network name in cloud account.";
+              type string;
+            }
+          }
+
+          case vim-network-profile {
+            leaf ip-profile-ref {
+              description "Named reference to IP-profile object";
+              type string;
+            }
+          }
+
+        }
+      }
+
+      uses manotypes:ip-profile-list;
+
+      list connection-point {
+        key "name";
+        description
+          "List for external connection points. Each VNF has one
+          or more external connection points that connect the VNF
+          to other VNFs or to external networks. Each VNF exposes
+          connection points to the orchestrator, which can construct
+          network services by connecting the connection points
+          between different VNFs. The NFVO will use VLDs and VNFFGs
+          at the network service level to construct network services.";
+
+        uses common-connection-point;
+      }
+
+      list vdu {
+        description "List of Virtual Deployment Units";
+        key "id";
+
+        leaf id {
+          description "Unique id for the VDU";
+          type string;
+        }
+
+        leaf name {
+          description "Unique name for the VDU";
+          type string;
+        }
+
+        leaf description {
+            description "Description of the VDU.";
+            type string;
+        }
+
+        leaf count {
+          description "Number of instances of VDU";
+          type uint64;
+        }
+
+        leaf mgmt-vpci {
+          description
+              "Specifies the virtual PCI address. Expressed in
+             the following format dddd:dd:dd.d. For example
+             0000:00:12.0. This information can be used to
+             pass as metadata during the VM creation.";
+          type string;
+        }
+
+        uses manotypes:vm-flavor;
+        uses manotypes:guest-epa;
+        uses manotypes:vswitch-epa;
+        uses manotypes:hypervisor-epa;
+        uses manotypes:host-epa;
+
+        list alarm {
+          key "alarm-id";
+
+          uses manotypes:alarm;
+        }
+
+        uses manotypes:image-properties;
+
+        choice cloud-init-input {
+          description
+            "Indicates how the contents of cloud-init script are provided.
+             There are 2 choices - inline or in a file";
+
+          case inline {
+            leaf cloud-init {
+              description
+                "Contents of cloud-init script, provided inline, in cloud-config format";
+              type string;
+            }
+          }
+
+          case filename {
+            leaf cloud-init-file {
+              description
+                "Name of file with contents of cloud-init script in cloud-config format";
+                type string;
+            }
+          }
+        }
+
+        uses manotypes:supplemental-boot-data;
+
+        list internal-connection-point {
+          key "id";
+          description
+            "List for internal connection points. Each VNFC
+            has zero or more internal connection points.
+            Internal connection points are used for connecting
+            the VNF with components internal to the VNF. If a VNF
+            has only one VNFC, it may not have any internal
+            connection points.";
+
+          uses common-connection-point;
+
+          leaf internal-vld-ref {
+            type leafref {
+              path "../../../internal-vld/id";
+            }
+          }
+        }
+
+        list interface {
+          description
+              "List of Interfaces (external and internal) for the VNF";
+          key name;
+
+          leaf name {
+            description
+                "Name of the interface. Note that this
+                name has only local significance to the VDU.";
+            type string;
+          }
+
+          leaf position {
+            description
+                "Explicit Position of the interface within the list";
+            type uint32;
+          }
+
+          leaf type {
+            description
+                "Type of the Interface";
+            type interface-type;
+
+            default "EXTERNAL";
+          }
+
+          choice connection-point-type {
+            case internal {
+              leaf internal-connection-point-ref {
+                description
+                    "Leaf Ref to the particular internal connection point";
+                type leafref {
+                   path "../../internal-connection-point/id";
+                 }
+              }
+            }
+            case external {
+              leaf external-connection-point-ref {
+                description
+                    "Leaf Ref to the particular external connection point";
+                type leafref {
+                   path "../../../connection-point/name";
+                 }
+              }
+            }
+          }
+
+          uses virtual-interface;
+        }
+
+
+        list volumes {
+          key "name";
+
+          leaf name {
+            description "Name of the disk-volumes, e.g. vda, vdb etc";
+            type string;
+          }
+
+          uses manotypes:volume-info;
+        }
+      }
+
+      list vdu-dependency {
+        description
+            "List of VDU dependencies.";
+
+        key vdu-source-ref;
+        leaf vdu-source-ref {
+          type leafref {
+            path "../../vdu/id";
+          }
+        }
+
+        leaf vdu-depends-on-ref {
+          description
+            "Reference to the VDU on which
+            the source VDU depends.";
+          type leafref {
+            path "../../vdu/id";
+          }
+        }
+      }
+
+      leaf service-function-chain {
+        description "Type of node in Service Function Chaining Architecture";
+
+        type enumeration {
+          enum UNAWARE;
+          enum CLASSIFIER;
+          enum SF;
+          enum SFF;
+        }
+        default "UNAWARE";
+      }
+
+      leaf service-function-type {
+        description
+          "Type of Service Function.
+           NOTE: This needs to map with Service Function Type in ODL to
+           support VNFFG. Service Function Type is mandatory param in ODL
+           SFC. This is temporarily set to string for ease of use";
+        type string;
+      }
+
+      uses manotypes:monitoring-param;
+
+      list placement-groups {
+        description "List of placement groups at VNF level";
+
+        key "name";
+        uses manotypes:placement-group-info;
+
+        list member-vdus {
+
+          description
+              "List of VDUs that are part of this placement group";
+          key "member-vdu-ref";
+
+          leaf member-vdu-ref {
+            type leafref {
+              path "../../../vdu/id";
+            }
+          }
+        }
+      }
+  }
+}
+
+// vim: sw=2