Re: gEDA-user: Strange behavior with input-1.sym and output-1.sym?

[dfro@xxxxxxxxx]

John Doty wrote:
> On May 7, 2009, at 6:53 AM, Stefan Salewski wrote:
> 
>> Of course it may be a bug of 1.4.0, I
>> can not test this, have only 1.4.3 available.
> 
> One could make the case that the bug is in 1.4.3. A component without  
> either refdes= or  graphical=1 might reasonably be considered an  
> error. But the treatment of attributes in gEDA keeps changing. I wish  
> there was better documentation on how attributes are actually *used*  
> by gschem and gnetlist. The Symbol Creation Guide is "style manual",  
> not  a language definition.
> 
> The "anything goes" approach to attributes was fine when there were  
> few special cases in the core code, but increasingly I'm seeing  
> strange behavior that's apparently due to the core code assuming  
> attribute meaning that's undocumented and/or specific to the gsch2pcb  
> flow. This is not good.
> 
> John Doty              Noqsi Aerospace, Ltd.
> http://www.noqsi.com/
> jpd@xxxxxxxxx
> 

And, if it becomes part of the gschem/gsch2pcb/pcb standard that all 
non-physical schematic objects require 'graphical=1', then 'graphical=1' 
should be automatically part of these objects (i.e. input-1.sym, 
output-1.sym), so that the user does not have to add it every time 
he/she uses the symbol.

Also, I think this info about the attribute treatment of 
physical/non-physical schematic elements should be added to the gsch2pcb 
tutorial.

Dave



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