module tapi-notification {
    namespace "urn:onf:params:xml:ns:yang:tapi-notification";
    prefix tapi-notification;
    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 notification-context;
        description "Augments the base TAPI Context with NotificationService information";
    }
    /***********************
    * package object-classes
    **********************/ 
        grouping notification-subscription-service {
            list notification {
                key 'uuid';
                config false;
                uses notification;
                description "none";
            }
            container notification-channel {
                uses notification-channel;
                description "none";
            }
            container subscription-filter {
                uses subscription-filter;
                description "none";
            }
            leaf subscription-state {
                type subscription-state;
                description "none";
            }
            leaf-list supported-notification-types {
                type notification-type;
                config false;
                min-elements 1;
                description "none";
            }
            leaf-list supported-object-types {
                type object-type;
                config false;
                min-elements 1;
                description "none";
            }
            uses tapi-common:service-spec;
            description "none";
        }
        grouping subscription-filter {
            leaf-list requested-notification-types {
                type notification-type;
                config false;
                description "none";
            }
            leaf-list requested-object-types {
                type object-type;
                config false;
                description "none";
            }
            leaf-list requested-layer-protocols {
                type tapi-common:layer-protocol-name;
                config false;
                description "none";
            }
            leaf-list requested-object-identifier {
                type tapi-common:uuid;
                config false;
                description "none";
            }
            leaf include-content {
                type boolean;
                config false;
                description "Indicates whether the published Notification includes content or just the Notification Id (which enables retrieval of the notification at the later stage)";
            }
            uses tapi-common:local-class;
            description "none";
        }
        notification notification {
            uses notification;
            description "none";
        }
        grouping notification {
            leaf notification-type {
                type notification-type;
                description "none";
            }
            leaf target-object-type {
                type object-type;
                description "none";
            }
            leaf target-object-identifier {
                type tapi-common:uuid;
                description "none";
            }
            list target-object-name {
                key 'value-name';
                min-elements 1;
                uses tapi-common:name-and-value;
                description "none";
            }
            leaf event-time-stamp {
                type tapi-common:date-and-time;
                description "none";
            }
            leaf sequence-number {
                type uint64;
                config false;
                description "A monotonous increasing sequence number associated with the notification.
                    The exact semantics of how this sequence number is assigned (per channel or subscription or source or system) is left undefined.";
            }
            leaf source-indicator {
                type source-indicator;
                description "none";
            }
            leaf layer-protocol-name {
                type tapi-common:layer-protocol-name;
                description "none";
            }
            list changed-attributes {
                key 'value-name';
                uses name-and-value-change;
                description "none";
            }
            list additional-info {
                key 'value-name';
                uses tapi-common:name-and-value;
                description "none";
            }
            leaf additional-text {
                type string;
                description "none";
            }
            container tca-info {
                uses tca-info;
                description "none";
            }
            container alarm-info {
                uses alarm-info;
                description "none";
            }
            uses tapi-common:resource-spec;
            description "none";
        }
        grouping notification-channel {
            leaf stream-address {
                type string;
                config false;
                description "The address/location/URI of the channel/stream to which the subscribed notifications are published.
                    This specifics of this is typically dependent on the implementation protocol & mechanism and hence is typed as a string.";
            }
            leaf next-sequence-no {
                type uint64;
                config false;
                description "The sequence number of the next notification that will be published on the channel";
            }
            uses tapi-common:local-class;
            description "none";
        }
        grouping notification-context {
            list notif-subscription {
                key 'uuid';
                uses notification-subscription-service;
                description "none";
            }
            list notification {
                key 'uuid';
                config false;
                uses notification;
                description "none";
            }
            description "none";
        }
        grouping alarm-info {
            leaf is-transient {
                type boolean;
                config false;
                description "none";
            }
            leaf pervceived-severity {
                type perceived-serverity-type;
                config false;
                description "none";
            }
            leaf probable-cause {
                type string;
                config false;
                description "none";
            }
            leaf service-affecting {
                type service-affecting;
                description "none";
            }
            description "none";
        }
        grouping tca-info {
            leaf is-transient {
                type boolean;
                config false;
                description "none";
            }
            leaf threshold-crossing {
                type threshold-crossing-type;
                description "none";
            }
            leaf threshold-parameter {
                type string;
                config false;
                description "none";
            }
            leaf threshold-value {
                type uint64;
                config false;
                description "none";
            }
            description "none";
        }

    /***********************
    * package type-definitions
    **********************/ 
        grouping name-and-value-change {
            leaf value-name {
                type string;
                description "The name of the value. The value need not have a name.";
            }
            leaf old-value {
                type string;
                description "The value";
            }
            leaf new-value {
                type string;
                description "The value";
            }
            description "A scoped name-value triple, including old value and new value";
        }
        typedef notification-type {
            type enumeration {
                enum OBJECT_CREATION {
                    description "Not a normal state. The system is unable to determine the correct value.";
                }
                enum OBJECT_DELETION {
                    description "none";
                }
                enum ATTRIBUTE_VALUE_CHANGE {
                    description "none";
                }
                enum ALARM_EVENT {
                    description "none";
                }
                enum THRESHOLD_CROSSING_ALERT {
                    description "none";
                }
            }
            description "List of supported Notifications types.";
        }
        typedef object-type {
            type enumeration {
                enum TOPOLOGY {
                    description "none";
                }
                enum NODE {
                    description "none";
                }
                enum LINK {
                    description "none";
                }
                enum CONNECTION {
                    description "none";
                }
                enum PATH {
                    description "none";
                }
                enum CONNECTIVITY_SERVICE {
                    description "none";
                }
                enum VIRTUAL_NETWORK_SERVICE {
                    description "none";
                }
                enum PATH_COMPUTATION_SERVICE {
                    description "none";
                }
                enum NODE_EDGE_POINT {
                    description "none";
                }
                enum SERVICE_INTERFACE_POINT {
                    description "none";
                }
                enum CONNECTION_END_POINT {
                    description "none";
                }
            }
            description "The list of TAPI Global Object Class types on which Notifications can be raised.";
        }
        typedef source-indicator {
            type enumeration {
                enum RESOURCE_OPERATION {
                    description "none";
                }
                enum MANAGEMENT_OPERATION {
                    description "none";
                }
                enum UNKNOWN {
                    description "none";
                }
            }
            description "none";
        }
        typedef subscription-state {
            type enumeration {
                enum SUSPENDED {
                    description "none";
                }
                enum ACTIVE {
                    description "none";
                }
            }
            description "none";
        }
        typedef perceived-serverity-type {
            type enumeration {
                enum CRITICAL {
                    description "none";
                }
                enum MAJOR {
                    description "none";
                }
                enum MINOR {
                    description "none";
                }
                enum WARNING {
                    description "none";
                }
                enum CLEARED {
                    description "none";
                }
            }
            description "none";
        }
        typedef threshold-crossing-type {
            type enumeration {
                enum THRESHOLD_ABOVE {
                    description "none";
                }
                enum THRESHOLD_BELOW {
                    description "none";
                }
                enum CLEARED {
                    description "none";
                }
            }
            description "none";
        }
        typedef service-affecting {
            type enumeration {
                enum SERVICE_AFFECTING {
                    description "none";
                }
                enum NOT_SERVICE_AFFECTING {
                    description "none";
                }
                enum UNKNOWN {
                    description "none";
                }
            }
            description "none";
        }

    /***********************
    * package interfaces
    **********************/ 
        rpc get-supported-notification-types {
            description "none";
            output {
                leaf-list supported-notification-types {
                    type notification-type;
                    min-elements 1;
                    description "none";
                }
                leaf-list supported-object-types {
                    type object-type;
                    min-elements 1;
                    description "none";
                }
            }
        }
        rpc create-notification-subscription-service {
            description "none";
            input {
                container subscription-filter {
                    uses subscription-filter;
                    description "none";
                }
                leaf subscription-state {
                    type subscription-state;
                    description "none";
                }
            }
            output {
                container subscription-service {
                    uses notification-subscription-service;
                    description "none";
                }
            }
        }
        rpc update-notification-subscription-service {
            description "none";
            input {
                leaf subscription-id-or-name {
                    type string;
                    description "none";
                }
                container subscription-filter {
                    uses subscription-filter;
                    description "none";
                }
                leaf subscription-state {
                    type subscription-state;
                    description "none";
                }
            }
            output {
                container subscription-service {
                    uses notification-subscription-service;
                    description "none";
                }
            }
        }
        rpc delete-notification-subscription-service {
            description "none";
            input {
                leaf subscription-id-or-name {
                    type string;
                    description "none";
                }
            }
            output {
                container subscription-service {
                    uses notification-subscription-service;
                    description "none";
                }
            }
        }
        rpc get-notification-subscription-service-details {
            description "none";
            input {
                leaf subscription-id-or-name {
                    type string;
                    description "none";
                }
            }
            output {
                container subscription-service {
                    uses notification-subscription-service;
                    description "none";
                }
            }
        }
        rpc get-notification-subscription-service-list {
            description "none";
            output {
                list subscription-service {
                    uses notification-subscription-service;
                    description "none";
                }
            }
        }
        rpc get-notification-list {
            description "none";
            input {
                leaf subscription-id-or-name {
                    type string;
                    description "none";
                }
                leaf time-period {
                    type string;
                    description "none";
                }
            }
            output {
                list notification {
                    uses notification;
                    description "none";
                }
            }
        }

}