AIM Direct Part Marking (DPM) Overview & ISO/IEC DPM Quality Guidelines – http://www.aimglobal.org/?page=dpm
ISO/IEC TR 29158:2011: Information technology – Automatic identification and data capture techniques – Direct Part Mark (DPM) Quality Guideline – https://www.iso.org/standard/45237.html
SAE International Standard AS9132: Data Matrix (2d) Coding Quality Requirements for Parts Marking – http://standards.sae.org/as9132/
SAE International Standard AS478: Identification Marking Methods – http://standards.sae.org/as478/
Spec 2000 Traceability Standards – http://www.spec2000.com/50.html