MAJOR:

1. Support for PER encoding. Requires advanced subtype constraints support,
which is already completed.

2. Support for Information Object Classes.
   Status:	Support for parsing IOCs is mostly present.
		Support for slicing the IOCs to produce "views"
		is not yet designed.

MEDIUM:

1. Support for DEFAULT encoding and decoding, at least in INTEGER/ENUMERATED types.
2. Support for EXTERNAL, EMBEDDED-PDV and CHARACTER STRING types.

MINOR:

1. Parsing of CONSTRAINED BY clauses

2. If the generated target language source file is not different from
the one already present (except maybe a compiler version in comments), 
do not update the file. Prevents trashing file dependencies in multifile
compilation.