olemus
ISO/IEC 19086-1, 27018, 29100:
füüsiline isik, kellega on seotud isikutuvastusteave
= natural person to whom the personally identifiable information (PII) relates

ülevaateid
https://www.lawinsider.com/dictionary/pii-principal

https://www.audit-academy.be/images/downloads/IS-ISO27701-2019V1.pdf