7. The system of claim 1 , wherein the operations further comprise: generating an execution tree based on a sequence of tokens, the execution tree including a plurality of nodes, a node of the execution tree being associated with one or more tokens; and associating the execution tree with a current version identifier of the token database.
7. The system of claim 1 , wherein the operations further comprise: generating an execution tree based on a sequence of tokens, the execution tree including a plurality of nodes, a node of the execution tree being associated with one or more tokens; and associating the execution tree with a current version identifier of the token database. 17. The system of claim 7 , wherein the operations further comprise executing one or more nodes of the execution tree associated with inserting a sequence of tokens into a token of the token database, the token being one of a cluster token and a derived token, the cluster token referencing one or more instance tokens that conform to one or more conditions associated with the cluster token, the derived token referencing one or more instance tokens that are derived or calculated according to code associated with the derived token.