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Date: Mon, 1 Feb 2016 11:02:48 +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] [pcb] Blind/Buried vias
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> Hello list members,
> 
> I did a small write up on BBvias here:
> 
> https://blueprints.launchpad.net/pcb/+spec/lp699448
> 
> Just to lay down my thoughts on the subject.
> 
> Additions, corrections and all other feedback are welcome.
> 
> Kind regards,
> 
> Bert Timmerman.

There need to be a list of allowed via layer interconnections. Then I could see three possibilities:
  1. Explicitly select via predefined via.
  2. Select which layers should be connected for this via.
  3. Automatically select suitable via depending on which layers it is used.