ONIX 2.1

See the tags described in sections PR.8.15 and PR.8.17 of the ONIX 3 documentation.

Tag	Cardinality	Note
<`Contributor`>	0..n	One per contribution.
..<`PersonNameIdentifier`>	0..n	One per contributor ID (only one for the ISNI).
..<`PersonNameIDType`>	1	Value "16": ISNI. Type of identifier provided. Value from list 101.
..<`IDValue`>	1	ISNI. E.g.: "0123 4567 8901 2345" or "0123456789012345".