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Date: Thu, 28 Jan 2016 20:01:26 +0100
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On Thu, 28 Jan 2016 09:28:08 -0900
"Britton Kerin (britton DOT kerin AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com> wrote:

> On Thu, Jan 28, 2016 at 2:17 AM, Stephan Böttcher <geda AT psjt DOT org> wrote:
> > John Griessen <john AT ecosensory DOT com> writes:
> >
> >> On 01/28/2016 02:41 AM, Stephan Böttcher wrote:
> >>> "Chad Parker (parker DOT charles AT gmail DOT com) [viageda-user AT delorie DOT com]"  writes:
> >>
> >>>> >My experience has always been that hard to read spaghetti code is the
> >>>> >result of dealing with special cases that arise from having data structures
> >>>> >and functions that weren't designed quite right. Making things more generic
> >>>> >reduces the number of special cases and allows for the maximum reuse of
> >>>> >structures and functions.
> >>>> >
> >>>> >As I stated in my opening remark, feel free to take or leave my
> >>>> >suggestions. Obviously I think it would be wise to heed them
> >>> So do I.
> >>
> >> OK.  If having generic containers for data about a pc board and an
> >> assembly of parts onto it helps coding
> >> be easy let's do that.  Naming and documentation needs help in PCB.
> 
> It's highly unlikely it'll be easier for just BBVias.  I believe
> there's already an experimental branch that implements them.  Igor is
> likely to decide to implement them again while we all talk about it.
> For containers to pay off several other applications for them would
> need to exist and be important enough to get implemented.  What are
> they?
> 
> Britton

Stephan Böttcher posted a good plan a few days ago:

The aim should be to change PCB in small incremental steps.

- Remove the assumption that all layers except "outline" are conductive.
- Make implicit layers explicit and allow to draw on them, soldermask, solderpaste.
- Allow more/all things inside Elements, on explicit layers.
- Use a mapping from Library layer names to Layout layer names.
- Allow to draw negative objects.  Add drawing depth to the objects.
- Represent the implicit objects explicitly, clearances, soldermask, solderpaste.
- Make Vias more like Elements.

First change the data structures, and update the tools do exactly what
they did before, then think about which new possibilities to present to
the GUI user, and how.

- Add a via stack editor.
- Add grouping of layout objects.