1. At a computer system including a processor and a memory, a computer-implemented method for implementing a generalized workflow execution model configured to provide access to individually accessible workflow elements, the method comprising: an act of instantiating a generalized workflow execution model that provides access to one or more workflow elements stored in a database that is connected to the workflow execution model, wherein the workflow execution model includes the following: one or more activity models that include both agents which are configured to express the control flow of the activity models and symbols which represent values usable by the activity models; and a portion of metadata configured to identify the generalized workflow execution model; wherein the one or more workflow elements are stored in the database as individually accessible workflow elements that are individually accessible by workflow programs through the generalized workflow execution model, each of the individually accessible workflow elements having been divided from at least one previous workflow subsequent to the at least one previous workflow being created; an act of receiving user input requesting one or more of the individually accessible workflow elements; and an act of accessing the database to provide the one or more requested individually accessible workflow elements using the generalized workflow execution model.