ONIX Code Lists Issue 36, January 2017
List 43: Text item identifier type code

Value Description Notes

01 Proprietary For example, a publisher’s own identifier. Note that <IDTypeName> is required with proprietary identifiers
03 GTIN-13 Formerly known as the EAN-13 (unhyphenated)
06 DOI
09 PII Publisher item identifier
10 SICI For serial items only
11 ISTC
15 ISBN-13 (Unhyphenated)