For the URF content ontology (), add a content-fingerprint property for a content identify verification fingerprint value similar to an HTTP ETag. For error checking also add a sub-namespace content-check for checksums. Add properties with these handles:
The value will be the binary message digest. These properties allow the bit length to be determined by the value. Varying bit lengths such as SHA-512/224 are not supported.
In the future we may add (complementary) specific algorithm properties such as content-check-sha3_512.