Re: gEDA-user: Soft and Hard symbols

[Edward Hennessy <ehennes@xxxxxxxxxxxxx>]

On Jan 3, 2011, at 8:20 AM, Stefan Salewski wrote:

> I guess all this was discussed on the list multiple times in the past,
> so this is more a note to myself...
> 
> I think it may be useful to have two types of symbols, soft and hard.
> Hard symbols have an footprint attribute and maybe additional hard
> properties. Soft symbols are simple an OpAmp or a resistor -- only type,
> no parameters defined. For schematic entry the use can select "Add soft
> symbol" or add hard symbol (if he exactly knows what he wants). If a
> schematic contains soft symbols, then there is an additional step
> necessary before PCB layout can start: Selecting footprints and slots --
> this step may be supported by databases. (The user may have the optional
> choice to generate hard symbols from soft ones by specifying footprints
> and other hard facts in an early input stage.)

Besides allowing attributes to contain a value representing unknown or
be empty, I don't see why the application needs to know the difference
between a hard and soft symbol.

If the schematic editor allows empty attributes and allows the user
to edit these attributes, wouldn't it be capable of the functionality
requested above?

> Note, this is not what we currently have with our light/heavy symbols.
> The point is, that we should make a strict decision, not make a soft
> transition from light to heavy but adding some attributes.

Cheers,
Ed


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