Name:  Nickname.

Base Class:  FreeformClass.

Applicability: Nicknames or display names in messaging and text
conferencing technologies; petnames for devices, accounts, and
people; and other uses of nicknames, display names, or petnames.

Replaces:  None.

Width Mapping Rule:  None (handled via NFKC).

Additional Mapping Rule: Map non-ASCII space characters to SPACE
(U+0020), strip leading and trailing space characters, and map
interior sequences of multiple space characters to a single
instance of SPACE (U+0020).

Case Mapping Rule: Map uppercase and titlecase code points to
lowercase using the Unicode toLowerCase() operation.

Normalization Rule:  NFKC.

Directionality Rule:  None.

Enforcement:  To be specified by applications.

Specification:  RFC-ietf-precis-7700bis-10.