This has been suggested before but I was asked about it yesterday.

It would be great to have separate library and simulator fields - rather 
than sim interface settings taking up library fields.

An increasing number of companies seem to be using "One Sch Symbol for each 
company part" method of running Protel.  In this method you have a 
different sch part for each variant of a component (footprint, resistor 
value etc).  The library fields can then be coded with read only stuff 
including manufacturer part number company approval numbers etc.

The two main downsides with this method;
1) It is not currently possible to lock the footprint an part type fields 
in the Sch library component.  I think it should be possible to fully lock 
down all aspects of a sch symbol apart from possibly the designator.  (So 
the footprint can be locked, as can the part/value and the part fields.)
2) Sim interface info takes library fields which makes it difficult to 
design symbols that are botn sim and final design ready.

Any comments?

Ian Wilson

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