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Subject: Re: [geda-user] The nature of gEDA layers (Atomic id)
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From: John Griessen <john AT ecosensory DOT com>
Message-ID: <56AA5948.4090109@ecosensory.com>
Date: Thu, 28 Jan 2016 12:09:12 -0600
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On 01/28/2016 09:52 AM, Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
>> One thing needed in core data structures is room for and a mechanism for a unique ID for each atomic board element such as
>> >trace, pad, polygon, text...
> Can you explain why?

If you had that you could build up physical connectivity DRC check results that are accurate is the main reason.
Then it can be part of attributes used in extracted netlists to compare with schematic netlist for simulations.
It could be used by routers - define a list of elements that act as a boundary for this and that.