Abstract: A computer apparatus for implementing a workflow, the workflow being defined by a sequence of activity nodes that include a plurality of interactive nodes, the computer apparatus comprising a processor for arranging and initiating the execution of the activity nodes in accordance with the defined sequence, wherein each interactive node is arranged to allow a user to input data for use in the execution of an activity node, the processor being arranged to analyse the user data to determine the interactive node in the sequence of activity nodes to which the data is associated.

Abstract: A computer apparatus for implementing a workflow, the workflow being defined by a sequence of activity nodes, the computer apparatus comprising a process executor for arranging the execution of the activity nodes in accordance with the defined sequence and being arranged to provide, in accordance with the sequence, node definitions associated with the activity nodes to a node handler to allow the node handler to initiate execution of the activity node.