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conformanceVersion / apiVersion
Two Vulkan version fields: one declaring which API level a driver targets, the other whether it's certified for it.
apiVersion states the Vulkan version whose features the implementation exposes (kept at 1.3 here), while conformanceVersion states the version it has been formally certified against. They are independent: you can implement an API level without holding certification for it. Reporting them separately keeps the capability claim distinct from the certification claim.
See also
- conformanceVersionA Vulkan field a driver fills in to state which version of the conformance tests it is officially certified against.
- conformanceOfficial certification from a standards body that a driver genuinely meets the specification.
- conformance groupA named bundle of official test cases covering one feature area of a graphics spec.