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	Wed, 30 Dec 2015 10:42:13 -0800 (PST)
Date:	Wed, 30 Dec 2015 19:42:12 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
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Subject:	Re: [geda-user] XML file format (what could be expected)
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> > > 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.

An annotation mechanism may be a solution if could be made without adding confusion.


> > 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.

A sub sheet is instantiated by attaching the attribute "source" to a symbol. What would be needed is a mechanism to use attributes in symbol for schematic values with some calculations in between. Without the symbol there would be no attributes to read which is correct because there are no sub sheet. I still think other things are more important like clearance values in pcb for example, it is in more common use.


Nicklas Karlsson

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