module openconfig-transport-line-connectivity {

    yang-version 1;

    namespace
      "http://openconfig.net/yang/openconfig-transport-line-connectivity";

    prefix oc-line-connect;

    import openconfig-extensions {
      prefix oc-ext;
    }
    import openconfig-transport-types {
      prefix oc-opt-types;
    }

    organization "OpenConfig working group";

    contact
      "OpenConfig working group
      www.openconfig.net";

    description
      "This model describes the device-level connectivity
    (e.g., internal port-to-port) for optical transport line
    system elements such as wavelength routers (ROADMs) and
    amplifiers. All connections are uni-directional. Note that
    this model explicitly does not intend to model or provide
    a path to any higher layer topology modeling and is only
    for modeling internal links";

    revision "2019-06-27" {
      description "Initial revision";
      reference
        "0.1.0";

    }

    oc-ext:openconfig-version "0.1.0";
    oc-ext:regexp-posix;
    oc-ext:catalog-organization "openconfig";
    oc-ext:origin "openconfig";

    identity PORT_CONNECTION_TYPE {
      description
        "The definition for different types of port connections
      when a specific port is not known";
    }

    identity EXTERNAL {
      base PORT_CONNECTION_TYPE;
      description
        "The port connection is external to the device";
    }
  }  // module openconfig-transport-line-connectivity