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Date: Sun, 9 Jul 2017 13:26:19 +0200
From: "Nicklas SB 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] Refdes= mangling
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> > After some time of thinking, I realise the use cases when net= is
> > mangled or not. The former case is for subcircuits that share their
> > power sources, the latter is for such cases where such power sources
> > are would-be-isolated within the subschematics.
> 
> Just power sources? Sometimes you have other global things like clocks, busses, …

As is now I think power sources have net= attribute and netname will be local within sub circuit. It could be connected to the outside world with an oridany input symbol by connecting it to the local power source.

I think this is rather good solution but can't tell for sure there are any problematic side effects.

> Scoping of names is tricky, depending on flow. One gotcha in ngspice is that GND is a hard-wired alias for node 0, so you can’t have an isolated ground in a subcircuit unless you name it differently.

A warning about the hard wiring would probably be an appropiate. "Warning local net GND is hardwired with global net GND because of harwiring to node 0 in ngspice".


> > Are there use cases where it is OK to use refdes= without mangling in
> > flattened hierarchical schematic netlist? I see only a field for
> > various potential conflicts…

It might be good with unmangled name as an alias.