Design representation physical domain

A model of design representation with three domains of description (Behavioral, Structural, and Physical) and multiple levels of abstraction. 

Language Usage. Following the conventions described in our model of representation, the ISPS behavioral domain description is maintained as a pure behavior, represented separately from the structure or physical information. That is, the use of a "+", or operator in ISPS only specifies that the operation must take place on the named values. It does not specify the actual functional units to be used for each of the operations, the memory units in which the values are to be stored, nor does it specify the order in which the operations will take place. Thus, the Workbench has the freedom to design any hardware and control sequence implementation with the proviso that the final implementation s behavior match that specified by the lexical data-flow ordering and the required (NEXT) ordering of the original behavior. 

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