29. The at least one non-transitory computer-readable medium of claim 28 , wherein the legality expression language further includes an intent element specifying an intention that a principal wants to perform an act.
29. The at least one non-transitory computer-readable medium of claim 28 , wherein the legality expression language further includes an intent element specifying an intention that a principal wants to perform an act. 38. The at least one non-transitory computer-readable medium of claim 29 , comprising: a license element specifying a license associated with a contract specified using said legality expression.