The primitive for the variant Argon2(id|i|d)[-{memoryKiB}][-{passes}][-{parallelism}] should be kdf. Also, the variable {dkLen} may be considered.

The primitive for the variant Argon2(id|i|d)[-{memoryKiB}][-{passes}][-{parallelism}] should be kdf. Also, the variable {dkLen} may be considered.

Updated Argon2 variant primitive to kdf and added optional [-{dkLen}] for derived key length, consistent with existing {dkLen} usage in the registry.
Thanks.

Added Argon2 to schema/cryptography-defs.schema.json#/definitions/algorithmFamiliesEnum to keep the schema enum aligned with the registry data in schema/cryptography-defs.json.
Without this, BOM 1.7 validation rejects cryptoProperties.algorithmProperties.algorithmFamily: "Argon2" even though Argon2 is present in the registry.
This is a schema-only alignment change; it does not modify the Argon2 registry entry or its variant pattern/primitive semantics.

I noticed schema/cryptography-defs.schema.json did not end with a trailing newline in the current base.
My earlier update inadvertently introduced an EOF newline change alongside the intended enum update.
This follow-up commit keeps the file’s original EOF formatting (no trailing newline) and only adds "Argon2" to algorithmFamiliesEnum, so the schema enum remains consistent with cryptography-defs.json without unrelated formatting noise.