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Subject:	Re: [geda-user] Primitive electrical types [WAS: Re: first attempt at bus support in gnetlist for pcb]
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From:	John Doty <jpd AT noqsi DOT com>
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Date:	Sun, 10 Jan 2016 12:19:23 -0500
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On Jan 10, 2016, at 11:57 AM, John Griessen <john AT ecosensory DOT com> wrote:

> On 01/09/2016 06:55 AM, Peter Clifton (petercjclifton AT googlemail DOT com) =
[via geda-user AT delorie DOT com] wrote:
>> Pins and nets have different semantics regarding connection points - =
for one example. (One end only, vs. either end - plus
>> end-point to lands-on-line connections.)  To me, this implies there =
should be different types internally, even if they are
>> notionally sub-classes.
>=20
> The subject of types got me thinking of keeping it simple.  There are =
packaged types and layout group types and the rest is simply materials =
attribs of something-on-insulator.   I think the easiest way forward is =
layers model something-on-insulator, and the something can be on one =
side only, and that side can be oriented up or down.

Too much of a short cut for me. What about boards with steel layers? =
They=92re not insulators, but they also don=92t fit your plated-on =
model. Nor, really, do soldermask and so-called =93silk=94.

Why not actually use =93layer=94 with its meaning in English? Is that =
really so hard? As for =93drawing layers=94, let me suggest that =
=93pattern sets=94 is a much clearer, more correct term.

John Doty              Noqsi Aerospace, Ltd.
http://www.noqsi.com/
jpd AT noqsi DOT com



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