Zeigler, Bernard P.2013-06-192013-06-191979http://hdl.handle.net/10919/20341This paper elaborates an integrated hierarchy of model description formalisms previously proposed. We discuss the advantages of the hierarchical approach vis a vis a standardized universal model description language. Among the principal advantages are the opportunities provided for concise model specification while at the same time enabling equivalence testing of models expressed in diverse formalisms.application/pdfenIn CopyrightTechnical reportCS79002-Rhttp://eprints.cs.vt.edu/archive/00000834/01/CS79002-R.pdf