> > The script works fine with the latest element file
> > format even though he made it before it existed.
>
> Thats because the (x,y) data for each type of record type (Element,
> Line, .. etc)
> is in the same position in the record and all other data is output verbatim.
> This could break if the file format changes. If this happens you could
> modify the Pt_fields hash to accept the new format or to accept
> multiple formats.
I'm not sure what your script does, but I would think that the real
"because" reason is that pcb is fully capable of reading all old format
data. It doesn't matter what new file formats look like so long as
you aren't trying to use new features, write in one format and pcb
will always be able to read it.