APIS Diacritics & Special Characters

Very little APIS metadata content requires diacritics or special characters. When they do appear, they are often in citations and references.  If it is desired to include these in contributed records, it should be done with standard ISO Entities for special characters whenever feasible. See, e.g., Webmonkey's Reference: Special Characters

In MARC21, use

MARC 21 Specifications for Record Structure, Character Sets, and Exchange Media -- Character Sets: Part 3