... inputting pro-cess descriptions, binding them to identifiers, and operating on them. The graphics-oriented version of VERSA provides an X/Motif user interface, known as X-VERSA,with a point-and-click ... to yield ACSR [Bremond-Gregoire,1994; Lee, Bremond-Gregoire, and Gerber, 1994]. To improve the user interface,[Ben-Abdallah, Lee, and Choi, 1995; Ben-Abdallah, 1996; Ben-Abdallah and Lee,1998] ... semantics to provide237Real-Time Systems: Scheduling, Analysis, and Verification. Albert M. K. ChengCopyright¶2002 John Wiley & Sons, Inc.ISBN: 0-4 7 1-1 840 6-3 246PROCESS ALGEBRAParComP(a,n)−→...