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Date: Fri, 22 Jan 2016 20:20:08 +0100 (CET)
From: Roland Lutz <rlutz AT hedmen DOT org>
To: "Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] PCB data structures
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On Fri, 22 Jan 2016, Bert Timmerman (bert DOT timmerman AT xs4all DOT nl) [via 
geda-user AT delorie DOT com] wrote:
> AFAICT a via lives on board level.

I checked, you're right.  Thanks for the correction. :)  I noticed that 
this applies to rats, too.

While thinking about it, I'm not sure if a layout layer can contain pad 
and pin objects.  The documentation says that "footprints are created 
graphically by placing pads and then converting a group of pads to a 
component", but it also says "for surface mount pads, draw line segments".

> All the via_pads beloging to a via have all the same 
> location/dimensions/connectivity and are switched on/off per layer level 
> inside the via definition.

Are you referring to PCB data structures or the file format?