Electronic Data Interchange Format EDIF

Before getting into greater detail, first, a few basic definitions  

What follows is the EDIF file interspersed with brief descriptions. It has been shortened for clarity and easy understanding. 

First the default name, Synopsys edif is declared. This can be replaced by the actual design name by setting the edifout design name variable. This is followed by the (external...) construct, which provides information about the technology libraiy used. 

This is followed by information about different layers of the schematic, for example  

the different cells of the external libraiy that are used in this design are described partially. In other words, the (cell...) construct includes an (interface. ..) construct but no contents construct. For example, the cell LDl of the Isi lOk library is shown. The interface construct includes information about the ports, their properties and their directions (INPUT, OUTPUT) 

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