319 122-1
ETSI EN 319 122-1 CAdES digital signatures; Part 1: Building blocks and CAdES baseline signatures
V1.3.1 (2023-06)
en_31912201v010301p (PDF)
https://portal.etsi.org/exchangefolder/en_31912201v010301p.docx (Word)
Part of Signature creation & validation TI report