A fixed set of 96 characters required to be present in all conforming implementations. standard character|Standard characters are defined in \secref\StandardChars.
Any character that is not simple is not a standard character.
{\secref\StandardChars}
\issue{STANDARD-REPERTOIRE-GRATUITOUS:RENAME} \issue{CHARACTER-VS-CHAR:LESS-INCONSISTENT-SHORT} \issue{CHARACTER-PROPOSAL:2-1-1}