gEDA: design decisions: PCB<->schematic

[Major A <andras-at-NOSPAMusers_dot_sourceforge_dot_net>]

Hi, 

I have thought out some of the details of the upcoming rewrite of
Lasagne, and this time, I am going to try not just to make a good tool
for myself, but a really good PCB design program. The one thing I have
not been able to work out yet is how strongly the schematic editor
(gschem I suppose) and the PCB editor should be tied together. In many
commercial packages they are basically part of one big program --
Eagle has this "forward-backward annotation", for example.

Now the question: has anyone ever successfully made use of two-way
communication between the layout editor and the schematic editor? Does
it really make sense to make changes to the schematic diagram when
someone rearranges connections on the PCB?

Doing one-way communication is rather easy to implement, I think I
have a good plan for that, but I'm quite sure the other way
(PCB->schematic) would be very hard to add. Is there any need for it
at all?

I'm the last person to know the answer, having built all my projects
so far on the PCB directly without any schematic diagram.

  Andras

===========================================================================
Major Andras
    e-mail: andras@users.sourceforge.net
    www:    http://andras.webhop.org/
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