module tapi-virtual-network {
    namespace "urn:onf:params:xml:ns:yang:tapi-virtual-network";
    prefix tapi-virtual-network;
    import tapi-topology {
        prefix tapi-topology;
    }
    import tapi-common {
        prefix tapi-common;
    }
    organization "Open Networking Foundation (ONF) / Open Transport Working Group(OTWG) / Transport API (TAPI) Project";
    contact "
        WG Web: TAPI SDK Project <http://opensourcesdn.org/projects/project-snowmass/>
        WG List: TAPI Discussion list <mailto: transport-api@login.opennetworking.org>,
        WG Chair: Karthik Sethuraman <mailto:karthik.sethuraman@necam.com>,
        Editor: Ricard Vilalta <mailto:ricard.vilalta@cttc.es>";
    description "none";
    revision 2017-05-31 {
        description "TAPI SDK 2.0-alpha";
        reference "ONF-TR-527, ONF-TR-512, ONF-TR-531, RFC 6020 and RFC 6087";
    }
    augment "/tapi-common:context" {
        uses virtual-network-context;
        description "Augments the base TAPI Context with VirtualNetworkService information";
    }
    /***********************
    * package object-classes
    **********************/ 
        grouping virtual-network-constraint {
            leaf src-service-end-point {
                type leafref {
                    path '/tapi-common:context/tapi-common:service-interface-point/tapi-common:uuid';
                }
                config false;
                description "none";
            }
            leaf sink-service-end-point {
                type leafref {
                    path '/tapi-common:context/tapi-common:service-interface-point/tapi-common:uuid';
                }
                config false;
                description "none";
            }
            leaf-list diversity-exclusion {
                type leafref {
                    path '/tapi-common:context/tapi-virtual-network:virtual-nw-service/tapi-virtual-network:vnw-constraint/tapi-virtual-network:local-id';
                }
                config false;
                description "none";
            }
            container requested-capacity {
                uses tapi-common:capacity;
                description "none";
            }
            leaf service-level {
                type string;
                description "An abstract value the meaning of which is mutually agreed – typically represents metrics such as - Class of service, priority, resiliency, availability";
            }
            leaf-list service-layer {
                type tapi-common:layer-protocol-name;
                description "none";
            }
            list cost-characteristic {
                key 'cost-name';
                uses tapi-topology:cost-characteristic;
                description "The list of costs where each cost relates to some aspect of the TopologicalEntity.";
            }
            list latency-characteristic {
                key 'traffic-property-name';
                uses tapi-topology:latency-characteristic;
                description "The effect on the latency of a queuing process. This only has significant effect for packet based systems and has a complex characteristic.";
            }
            uses tapi-common:local-class;
            description "none";
        }
        grouping virtual-network-service {
            leaf topology {
                type leafref {
                    path '/tapi-common:context/tapi-topology:topology/tapi-topology:uuid';
                }
                config false;
                description "none";
            }
            list end-point {
                key 'local-id';
                min-elements 2;
                uses virtual-network-service-end-point;
                description "none";
            }
            list vnw-constraint {
                key 'local-id';
                min-elements 1;
                uses virtual-network-constraint;
                description "none";
            }
            leaf schedule {
                type string;
                description "none";
            }
            container state {
                uses tapi-common:admin-state-pac;
                description "none";
            }
            leaf-list layer-protocol-name {
                type tapi-common:layer-protocol-name;
                min-elements 1;
                description "none";
            }
            uses tapi-common:service-spec;
            description "The ForwardingConstruct (FC) object class models enabled potential for forwarding between two or more LTPs and like the LTP supports any transport protocol including all circuit and packet forms.
                At the lowest level of recursion, a FC represents a cross-connection within an NE.";
        }
        grouping virtual-network-service-end-point {
            leaf service-interface-point {
                type leafref {
                    path '/tapi-common:context/tapi-common:service-interface-point/tapi-common:uuid';
                }
                config false;
                description "none";
            }
            leaf role {
                type tapi-common:port-role;
                config false;
                description "Each EP of the FC has a role (e.g., working, protection, protected, symmetric, hub, spoke, leaf, root)  in the context of the FC with respect to the FC function. ";
            }
            leaf direction {
                type tapi-common:port-direction;
                config false;
                description "The orientation of defined flow at the EndPoint.";
            }
            leaf service-layer {
                type tapi-common:layer-protocol-name;
                config false;
                description "none";
            }
            uses tapi-common:local-class;
            description "The association of the FC to LTPs is made via EndPoints.
                The EndPoint (EP) object class models the access to the FC function. 
                The traffic forwarding between the associated EPs of the FC depends upon the type of FC and may be associated with FcSwitch object instances.  
                In cases where there is resilience the EndPoint may convey the resilience role of the access to the FC. 
                It can represent a protected (resilient/reliable) point or a protecting (unreliable working or protection) point.
                The EP replaces the Protection Unit of a traditional protection model. 
                The ForwadingConstruct can be considered as a component and the EndPoint as a Port on that component";
        }
        grouping virtual-network-context {
            list virtual-nw-service {
                key 'uuid';
                uses virtual-network-service;
                description "none";
            }
            description "none";
        }

    /***********************
    * package interfaces
    **********************/ 
        rpc create-virtual-network-service {
            description "none";
            input {
                list sep {
                    min-elements 2;
                    uses virtual-network-service-end-point;
                    description "none";
                }
                container vnw-constraint {
                    uses virtual-network-constraint;
                    description "none";
                }
                leaf conn-schedule {
                    type string;
                    description "none";
                }
            }
            output {
                container service {
                    uses virtual-network-service;
                    description "none";
                }
            }
        }
        rpc delete-virtual-network-service {
            description "none";
            input {
                leaf service-id-or-name {
                    type string;
                    description "none";
                }
            }
            output {
                container service {
                    uses virtual-network-service;
                    description "none";
                }
            }
        }
        rpc get-virtual-network-service-details {
            description "none";
            input {
                leaf service-id-or-name {
                    type string;
                    description "none";
                }
            }
            output {
                container service {
                    uses virtual-network-service;
                    description "none";
                }
            }
        }
        rpc get-virtual-network-service-list {
            description "none";
            output {
                list service {
                    uses virtual-network-service;
                    description "none";
                }
            }
        }

}