Authorship identifies a particular message author and the committed state that author was in when authoring a given message.

Identity is a public reference to a specific peer.

MessageRef uniquely identifies a message in a braid.

PostCommitment commits an author to a particular historical state of the braid and the application.

Precommitment commits an author to a particular set of future payloads.

Secret is a private value that can be used by a node to act as an Identity.

StateRef is a reference to a state of the application after processing a set of messages.