The Core Plan Representation (CPR) [Pease and Carrico, 1996] is an effort to develop a plan representation which supports the representation needs of many different planning systems. It is being developed for the DARPA Joint Task Force Advanced Technology Demonstration (JTF ATD) [Hayes-Roth, 1995], [Hayes-Roth Erman, 1994], [Carrico, 1996]. The goal of this effort is to leverage common functionality and facilitate the reuse and sharing of information between a variety of planning and control systems. The CPR embodies a standard which is general enough to cover a spectrum of domains from planning and process management to workflow and activity models. In addition, the representation can support complex, hierarchical plan structures. The prime motivation for the CPR effort is to address plan interchange requirements of several military planning systems, but this effort goes beyond military planning and presents a more general plan representation.