> Pinlabel is for humans, and for hierarchy. Pinseq is a unique > numerical identifier for the "pin", independent of the footprint if > any (not all symbols correspond to parts with footprints). > So slotting lets the PCB designer exchange one 2 input Nand gate for another in the same or different package. Swapping lets them swap the two inputs pins. How does the pinseq number do both at the same time? Pin labels are also for test. Each chip has a BSDL file that describes it's test logic by pin label name. This file is used to generate the test vectors. You need to create a netlist showing the components and pinlabels so that you can make the connections. This means that one file tells you that U1.FOO to signal BIG_FOO and all its other connections including TP_34. Another file gives you the X-Y location for TP_34 for the test fixture.
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