module huawei-cfg-ext {

    yang-version 1.1;

    namespace
      "urn:huawei:yang:huawei-cfg-ext";

    prefix cfg-ext;

    import huawei-extension {
      prefix ext;
    }

    organization
      "Huawei Technologies Co., Ltd.";

    contact
      "Huawei Industrial Base
    Bantian, Longgang
    Shenzhen 518129
    People's Republic of China
    Website: http://www.huawei.com
    Email: support@huawei.com";

    description
      "Display the changes information in the candidate datastore.";

    revision "2019-05-21" {
      description "Init revision.";
      reference
        "RFC 6241, Section 8.3.";

    }

    ext:task-name "config";

    rpc get-candidate-change {
      description
        "Configuration change information.";
      output {
        anydata effective-changes {
          description
            "Configuration change information recorded in the candidate datastore.";
        }

        anydata ineffective-changes {
          description
            "Changes in configurations that have not taken effect in the candidate datastore.";
        }
      }
    }  // rpc get-candidate-change

    rpc get-configuration-change {
      description
        "Get configuration change information.";
      input {
        container source {
          description
            "The source configuration.";
          choice config-source {
            description
              "Particular source configuration to compare from.";
            case checkpoint {
              description
                "Configuration checkpoints.";
              leaf commit-id {
                type string {
                  length "1..20";
                }
                description
                  "Uniquely identify a configuration checkpoint.";
              }
            }  // case checkpoint

            case running {
              description
                "Running configuration.";
              leaf running {
                type empty;
                description
                  "Running configuration.";
              }
            }  // case running

            case url {
              description
                "The URL-based configuration.";
              leaf url {
                type string {
                  length "1..256";
                }
                description
                  "The URL-based configuration.";
              }
            }  // case url
          }  // choice config-source
        }  // container source

        container target {
          description
            "The target configuration.";
          choice config-target {
            description
              "Particular target configuration to compare to.";
            case checkpoint {
              description
                "Configuration checkpoints.";
              leaf commit-id {
                type string {
                  length "1..20";
                }
                description
                  "Uniquely identify a configuration checkpoint.";
              }
            }  // case checkpoint

            case running {
              description
                "Running configuration.";
              leaf running {
                type empty;
                description
                  "Running configuration.";
              }
            }  // case running

            case url {
              description
                "The URL-based configuration.";
              leaf url {
                type string {
                  length "1..256";
                }
                description
                  "The URL-based configuration.";
              }
            }  // case url
          }  // choice config-target
        }  // container target

        leaf rollback-tag {
          type empty;
          description "With rollback tag.";
        }
      }

      output {
        anydata changes {
          description
            "Configuration changes.";
        }
      }
    }  // rpc get-configuration-change

    rpc load-configuration-change {
      description
        "After configuration difference loading, users can get to know the result of configuration difference loading through load-configuration-result node.";
      input {
        anydata changes {
          description
            "Configuration change to be loaded.";
        }
      }
    }  // rpc load-configuration-change

    rpc load-configuration-result {
      description
        "The result of load configuration changes.";
      output {
        anydata result {
          description
            "Configuration loading result.";
        }
      }
    }  // rpc load-configuration-result
  }  // module huawei-cfg-ext