The latest version of the specification is version v2.

Hash

The digest result of a hashing algorithm. When serialised as a string it MUST be in hexadecimal.

For example, the SHA2-256 digest for foo represented in hexadecimal is:

2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae

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