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Subject: Re: [geda-user] The nature of gEDA layers
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From: John Griessen <john AT ecosensory DOT com>
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Date: Wed, 27 Jan 2016 18:33:00 -0600
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On 01/27/2016 12:40 PM, Chad Parker (parker DOT charles AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
> the point is that the concept of a layer is really a more general abstraction and the physicality of them is an interpretation.
> Keep the concept of a layer simple, and let the concerns of interpretation and realization happen at a higher level such as DRC, a
> board house, a chip fab, a technician, etc.

I disagree -- it's conceptually simplifying, and easier to explain to new people if there is a correspondence to the real world.
And it's just a definition that is a choice of documentation and style policy first, then a coding rule to follow or break later.

The spaghetti code feeling of looking at PCB C files would be helped much by a few hard and fast definitions of style and overall 
meaning...