# description
Linked equipment, material, process, environment, people, and QMS context. It does not change the Open3DPP or Open3DCP core.

# properties.system.properties.unit_ref.description
Opaque private unit reference. Direct identifiers and serial numbers are excluded from public records and fingerprints.

# properties.system.properties.system_fingerprint.description
SHA-256 of the declared field-path projection after JCS/RFC8785 canonicalization. Direct personal and unit identifiers are excluded.

# properties.environment.properties.location_class.description
Exact location is intentionally not required.

# $defs.governance.properties.visibility.description
Metadata release classification. It does not itself grant access to referenced payloads.