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From: "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject: Re: [geda-user] A fileformat library
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> > > I recently did a tiny bit of work on the parser in pcb.  Of course we
> > > should continue to support it, but it's going to be tough to extend it
> > > much.  It's already overloaded in weird ways (e.g. thermals are parsed as
> > > flags, with their own non-flex sub-syntax, even though they don't set any
> > > actual flags).  If you do extend it you do hard work and still only pcb
> > can
> > > read it.  Of course you still have to teach the innards of pcb about your
> > > extensions in order for them to do anything useful.
> >
> > A good start might be to write down what need to be stored even though
> > they are not implemented right now and maybe never will be:
> >   1. Padstack, probably as collection of ordinary drawing primitives.
> >   2. Local copy and reference so update is possible.
> >   3. Net and possible segment attribute for route style, width.
> >   4. Net clerances between any net.
> >   5. Net clerance classes although (4.) could be extended before entering
> > pcb.
> >   6. Trace impedance.
> >   7. Differential impedance?
> >   8. Pin swapping!
> >   9. Slot swapping.
> >
> 
> Lev did something very like this last time this got discussed as sql
> schema.  I don't think it had all the above but some of it.
> 
> Britton

I wrote down some more in a text files. Would it be possible collect them somewhere there everybody could read them?


Nicklas Karlsson