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Date:	Thu, 9 Jul 2015 23:45:38 +0000
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Subject:	Re: [geda-user] Back annotation
From:	"Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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On Thu, Jul 9, 2015 at 11:32 PM, DJ Delorie <dj AT delorie DOT com> wrote:
>
>> How do you think this mapping tool should get the data from the schematic -
>> via a special scheme netlist script or by reading the schematic file itself?
>
> Nothing should read the schematic itself.  I thought of two ways:

Agreed. Too many of the scripts people have contributed directly
parse/interpret the sch or fp files. What we need is to tidy up
libgeda and pcb so that there is a documented interface for this kind
of work.

> 1. The various tools that deal with attributes also know about
>    "implied" attributes, which are the result of database and ruleset
>    queries.  Thus, in gschem's attribute window you'd have access to
>    the database as well as user-specified attributes.  This lets the
>    user override the rules while still having the convenience of a
>    database.
>
> 2. The netlister would need to feed its data into some sort of engine
>    that combines the specific attributes with implied ones, adds in
>    other external data and/or back-annotation data, and produce
>    whatever the backend needs.



-- 
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http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/

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