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Date: Sun, 12 Feb 2017 14:56:05 +0300
From: "Vladimir Zhbanov (vzhbanov AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To: gEDA User Mailing List <geda-user AT delorie DOT com>
Subject: Re: [geda-user] gschem gnetlist bug/feature
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On Sat, Feb 11, 2017 at 09:46:04AM +0000, Peter Clifton (petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com] wrote:
...

> That seems somewhat counter to my recollection. I thought graphical=1
> caused a symbol to be ignored completely? (Has this changed, or my
> recollection faulty?)

Here
  http://wiki.geda-project.org/geda:gnetlist_scheme_primitives
you can find a "legacy" gnetlist function
 'gnetlist:graphical-objs-in-net-with-attrib-get-attrib'
which was in gnetlist for years. It is used in the drc2 backend:
  - for nc symbols to ensure pins connected to such symbols aren't
    reflected in netlists;
  - and to prevent checking "if pin is not driven" if it has the
    "DontCheckIfDriven" drc directive for those cases where the
    user wants to check if there is no connections of non-compatible
    pin-types and disable some pins from this check.

-- 
  Vladimir