• PersonName type, with literals like 'Shepherd,John'
• parse literals to canonical internal form, display them
• BNF grammar defines what strings are valid PersonNames
• stored tuples may not be fixed-size (e.g. not simply 256)
• implement operations like equality and ordering tests
• provide for PersonNames to be used in indexes

Testing data and testing framework available soon

Note: complex.* only gives you a rough sketch (e.g. fixed-size)