module yang {

  namespace "urn:ietf:params:xml:ns:yang:1";

  prefix yang;

  import ietf-yang-metadata {

    prefix md;

    revision-date 2016-08-05;

  }

  organization

    "libyang";

  contact

    "Web:    <https://github.com/CESNET/libyang/>

     Author: Radek Krejci <rkrejci@cesnet.cz>";

  description

    "This is a kind of fake model with no data, typedefs or anything

     else. libyang uses this module to implement various YANG attributes

     defined in RFC 6020.";

  revision 2017-02-20 {

    description

      "Added metadata for NETCONF's edit-config manipulation with ordered

       lists and leaf-lists.";

    reference

      "RFC 7950: The YANG 1.1 Data Modeling Language";

  }

  revision 2016-02-11 {

    description

      "Initial revision";

    reference

      "RFC 6020: YANG - A Data Modeling Language for

       the Network Configuration Protocol (NETCONF)";

  }

  md:annotation insert {

    type enumeration {

      enum first;

      enum last;

      enum before;

      enum after;

    }

    reference "RFC7950 section 7.8.6. and section 7.7.9.";

    description

      "In user ordered leaf-list, the attribute can be used to control

       where in the leaf-list the entry is inserted. It can be used during

       the NETCONF <edit-config> \"create\" operations to insert a new list or

       leaf-list entry, or during \"merge\" or \"replace\" operations to insert

       a new list or leaf-list entry or move an existing one.

       If the value is \"before\" or \"after\", the \"value\"/\"key\" attribute

       MUST also be used to specify an existing entry in the list or leaf-list.

       If no \"insert\" attribute is present in the \"create\" operation, it

       defaults to \"last\".";

  }

  md:annotation value {

    type string;

    reference "RFC7950 section 7.7.9.";

    description

      "In user ordered leaf-list, the attribute must be used if the attribute

       insert is used and specifies before/after which existing instance the

       new instance should be inserted.";

  }

  md:annotation key {

    type string;

    reference "RFC7950 section 7.8.6.";

    description

      "In user ordered list, the attribute must be used if the attribute

       insert is used and specifies before/after which existing instance the

       new instance should be inserted.";

  }

}