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	Wed, 06 Jan 2016 23:38:43 -0800 (PST)
Date:	Thu, 7 Jan 2016 08:38:37 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] A fileformat library
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Somewhere there I could write it or send it, maybe a FUTURE file or similar in the source code.

Nicklas Karlsson


On Thu, 7 Jan 2016 01:03:09 +0100
"Levente (leventelist AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> wrote:

> That would be nice. Somewhere in the website? Somewhere in the repository?
> DJ?
> On 7 Jan 2016 00:46, "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via
> geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> wrote:
> 
> > > > > 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

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