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Status: Reported (1)

RFC 7700, "Preparation, Enforcement, and Comparison of Internationalized Strings Representing Nicknames", December 2015

Note: This RFC has been obsoleted by RFC 8266

Source of RFC: precis (art)

Errata ID: 4570
Status: Reported
Type: Technical
Publication Format(s) : TEXT

Reported By: Sam Whited
Date Reported: 2015-12-23

Section 2.3 says:

An entity that performs enforcement according to this profile MUST
   prepare a string as described in Section 2.2 and MUST also apply the
   following rules specified in Section 2.1 in the order shown:

   1.  Additional Mapping Rule
   2.  Normalization Rule
   3.  Directionality Rule

   After all of the foregoing rules have been enforced, the entity MUST
   ensure that the nickname is not zero bytes in length (this is done
   after enforcing the rules to prevent applications from mistakenly
   omitting a nickname entirely, because when internationalized
   characters are accepted, a non-empty sequence of characters can
   result in a zero-length nickname after canonicalization).

It should say:

An entity that performs enforcement according to this profile MUST
   prepare a string as described in Section 2.2 and MUST also apply the
   following rules specified in Section 2.1 in the order shown:

   1.  Additional Mapping Rule
   2.  Case Mapping Rule
   3.  Normalization Rule

   After all of the foregoing rules have been enforced, the entity MUST
   ensure that the nickname is not zero bytes in length (this is done
   after enforcing the rules to prevent applications from mistakenly
   omitting a nickname entirely, because when internationalized
   characters are accepted, a non-empty sequence of characters can
   result in a zero-length nickname after canonicalization).

Notes:

There is no directionality rule to be applied during enforcement as the directionality rule is part of NFKC, the case mapping rule (as mentioned in section 2.1).

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