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Date: Fri, 26 Aug 2022 13:40:36 +0200 (CEST)
From: Roland Lutz <rlutz AT hedmen DOT org>
To: "karl AT aspodata DOT se [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Subject: Re: [geda-user] lepton, empty attribute values
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On Fri, 26 Aug 2022, karl AT aspodata DOT se [via geda-user AT delorie DOT com] wrote:
> Since empty attributes are now legal in lepton, it is time to update:

Just to clarify: the backwards-compatible way to unset attributes is to 
set them to the special value "unknown", e.g., "device=unknown".  This is 
treated as if the attribute didn't exist and can be used to un-set 
attributes inherited from the symbol.

Roland