RFC 6991, "Common YANG Data Types", July 2013

Errata ID: 7062
Status: Rejected
Type: Technical
Publication Format(s) : TEXT
Reported By: Mazhar Rana
Date Reported: 2022-07-29
Rejected by: Rob Wilton
Date Rejected: 2022-07-29

Section 4 says:

     typedef ipv4-address-no-zone {
       type inet:ipv4-address {
         pattern '[0-9\.]*';
       }
       description
         "An IPv4 address without a zone index.  This type, derived from
          ipv4-address, may be used in situations where the zone is
          known from the context and hence no zone index is needed.";
     }

It should say:

     typedef ipv4-address-no-zone {
       type inet:ipv4-address {
         pattern '(([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])\.){3}'
         +  '([0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])';
       }
       description
         "An IPv4 address without a zone index.  This type, derived from
          ipv4-address, may be used in situations where the zone is
          known from the context and hence no zone index is needed.";
     }

Notes:

As per RFC 4001, dotted decimal format of IPv4 address is typically written in decimal digits, formatted as four 8-bit fields that are separated by periods.
--VERIFIER NOTES--
Since the ipv4-address-no-zone type is derived from the ipv4-address
type and the ipv4-address type has the detailed pattern, there is no
need to repeat the details. An ipv4-address value has to satisfy both
the ipv4-address-no-zone pattern and the ipv4-address pattern.

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