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From:	karl AT aspodata DOT se
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] [pcb] mainline: redundant attributes: bug or feature?
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Comments:	In-reply-to "Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
	message dated "Tue, 15 Aug 2017 07:28:51 +0200."
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Date:	Tue, 15 Aug 2017 10:30:08 +0200 (CEST)
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Niklas:
> > I suspect my thoughts were this: the user API should require/expect
> > unique keys (hence get-by-value) but the low level stuff should be able
> > to preserve (erroneous) redundant keys when loading/saving a *.pcb file.
> > Making load/store git friendly is a goal in pcb.
> 
> Attribute with same name added several times may in sort of be
> interpreted as a list of values. In gschem it is possible to add
> several attributes with same name but it never make sense and it's
> not possible to know for sure which value is used.

I use it for "documentation". In gschem, "T" can be multiline, but how
do you make a multiline attribute ?

E.g. for mcp16301.sym I have
T   400  3907   5 10  0 0   0 0 1
documentation=http://ww1.microchip.com/downloads/en/DeviceDoc/25004A.pdf
T   400  3685   5 10  0 0   0 0 1
documentation=http://ww1.microchip.com/downloads/en/AppNotes/01385A.pdf

Visually I'd be satisfied with
T   400  3907   5 10  0 0   0 0 3
documentation=
 http://ww1.microchip.com/downloads/en/DeviceDoc/25004A.pdf
 http://ww1.microchip.com/downloads/en/AppNotes/01385A.pdf

but I don't know if that would work for every thing in geda.

Regards,
/Karl Hammar

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