module huawei-ietf-snmp-ext {

    yang-version 1;

    namespace
      "urn:huawei:yang:huawei-ietf-snmp-ext";

    prefix hw-snmp-ext;

    import ietf-snmp {
      prefix snmp;
    }
    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 "Expand ietf-snmp.yang.";

    revision "2020-01-17" {
      description "Initial revision.";
      reference
        "Expand ietf-snmp.yang.";

    }

    ext:task-name "ietf-snmp";

    typedef key-hex-string {
      type string {
        length "2..max";
        pattern
          '([0-9a-fA-F]{2}(:[0-9a-fA-F]{2})*)?';
      }
      description
        "A hexadecimal string with octets represented as hex digits separated by colons.";
    }
  }  // module huawei-ietf-snmp-ext