Separate the Conversion class into a base and a subclass; the subclass
is pretty minimal but the separation is useful for....
NewConversion: New class that implements a somewhat different
approach to the conversion. This uses a table of
instances (rather than tuples) that have more
information than the tuples used for the older
conversion procedure. This allows a lot more control
over the conversion, and it seems to be pretty
stable.
TableEntry,
Parameter: New classes that are used to build the conversion
specification used by NewConversion.
TableParser: xmllib.XMLParser subclass that builds a conversion
specification from an XML document.
load_table(): Convenience function that loads a table from a file.
main(): Added flags --new and --old; these select which conversion is
used. The default is --new.
Several fixes have been made in the old conversion as well; these were
done before writing & switching to the new conversion, and should be
archived.
The next checkin of this file will discard the old conversion; is is
kept in this checkin to allow it to be retrieved if needed, and to
avoid lossing the bugfixes that have been made to it in the interim.
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