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Date:	Sun, 13 Sep 2015 18:51:14 -0400
Message-Id:	<201509132251.t8DMpE36005776@envy.delorie.com>
From:	DJ Delorie <dj AT delorie DOT com>
To:	geda-user AT delorie DOT com
In-reply-to:
	<CAC4O8c9pgmO7CBst5yJsEsyX=vXbP9eX-Ny_9c1cTPdD5mi-Ow AT mail DOT gmail DOT com>
	(geda-user AT delorie DOT com)
Subject:	Re: [geda-user] shortest way towards parsing .pcb files outside pcb
References:	<CAC4O8c_XFEAgyrokrwwavB0C+OjWXCB5xptkVwMx2i_t960qFg AT mail DOT gmail DOT com>
	<alpine DOT DEB DOT 2 DOT 00 DOT 1509131833210 DOT 2531 AT lichen> <CAC4O8c9pgmO7CBst5yJsEsyX=vXbP9eX-Ny_9c1cTPdD5mi-Ow AT mail DOT gmail DOT com>
Reply-To:	geda-user AT delorie DOT com

> DJ can you confirm how this works with respect to .pcb files?

.pcb files try to preserve the "unit-ness" of the units, but revert to
nanometers if they can't.  There should be no reason to lose data just
from reloading, and many people put pcb files in source control with
meaningful diffs between revisions (we planned it that way).

So yeah, a load/save cycle shouldn't change the file at all, assuming
the file was previously saved from pcb (i.e. in canonical form).

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