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From:	karl AT aspodata DOT se
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] XML file format (what could be expected)
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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 "Sun, 20 Dec 2015 17:33:41 +0100."
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Date:	Wed, 30 Dec 2015 19:00:07 +0100 (CET)
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Nicklas Karlsson:
> > On Dec 20, 2015, at 6:34 AM, karl AT aspodata DOT se wrote:
> > 
> > > I'd like to be able to do, gschem:
> > > 
> > > . give parameters to subsheets, like
> > >  output is to be 12V select suitable resistor devider
> > >  this filter has this freq., select suitable components
> > 
> > Neither gschem nor the schematic file format need any
> > modification to do this. It works nicely with SPICE. It’s a
> > downstream issue.

Ok, that is one way to do it. I meant more that I wanted gschem to
be able to show alt. the formula or the result, i.e. with the
parameter/formula applied.

> > If you’re doing this for layout in a big project, I think
> > you probably want the capability to use automatically generated
> > schematic files as your intermediates. The reason is that there’s
> > a subset of reviewers and technicians who find hierarchy
> > challenging, and parameterized hierarchy will be even more
> > confusing.

Strange, we live in world multiple hierarchies (the company, home,
state, etc). Do you have any idea why ?

> Yes parameterized hierarchy would probably be hard to get simple
> and easy to understand and otherwise it would only add confusion
> while it is supposed to make things easier. I use to add
> calculations as a text or possible some text about where
> calculations or suitable documentation could be found.

Parameters (or what to call it) is part of the design process so it
should be natural to have them in a schemata. So the problem is to
make gschem to show either the formula as is or it evaluated.

Regards,
/Karl Hammar

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