Dataflow Process Networks Manuscript received August 29, 1994; revised January 30, 1995. This work is part of the Ptolemy project, which is supported by the Advanced Research Projects Agency and the US Air Force under the RASSP program contract number F33615-93-C-1317, Semiconductor Research Corp. project number 94-DC-008, National Science Foundation contract number MIP-9201605, Office of Naval Technology (via Naval Research Laboratories), the State of California, and the following companies: Bell Northern Research, Dolby, Hitachi, Mentor Graphics, Mitsubishi, NEC, Pacific Bell, Philips, Rockwell, Sony, and Synopsys.The authors are with the Department of Electrical Engineering and Computer Sciences, The University of California, Berkeley, CA 94720 USA.IEEE Log Number 9409997 - EDWARD A. LEE; THOMAS M. PARKS (2002)