[DFDL-WG] bit order documents updated

[Mike Beckerle]

There are now several working documents having to do with bit-order. The
prior document has been taken down and replaced by 3 others.

These are all up on redmine:
http://redmine.ogf.org/dmsf/dfdl-wg?folder_id=5485

1) draft-gwdi-bit-order-features-v2.05.docx - Just describes the new
features + TDML extension. The biggest section is organized like an errata
specifying where things change in the spec. This should get incorporated
into errata, or perhaps just referenced from an errata.

Section 3 of this doc is the proposed errata and spec language for review.

There is one major open issue here, which is it is unclear whether the
mixed-endian byte order that was previously proposed is actually needed or
not. The swapping of 16-bit words appears to be not a per-element thing,
but something done as a pre-processing of an entire message body before
parsing. This isn't something we can handle in DFDL, much like
base64-encoded data and so forth. This may be the only place that needed
the 16-bit word swapping.

2) Understanding Bit Orderings -
draft-gwdi-mil-std-2045-understanding-bit-order-v2.05.docx - Material about
bit order - the Wire model vs. Number model material. This is effectively
just archiving this material for posterity.

If you already read this, you don't need to read it again.

3) draft-gwdi-mil-std-2045-additional-features-v2.05.docx - Material about
additional DFDL features that would be helpful in modeling MIL-STD-2045.

This can also be reviewed. Not as urgent as (1) above.

4) draft-gwdi-dfdl-standard-encodings-v03.docx - This is material that will
be integrated back into the spec as an appendix, but this incorporates
feedback on prior versions, and adds a 6-bit ascii encoding that is used by
the same binary format standards as the 7-bit one. Works same way, just 6
bits not 7, so there's some codepoint changes.

Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology |
www.tresys.com
Please note: Contributions to the DFDL Workgroup's email discussions are
subject to the OGF Intellectual Property Policy
<http://www.ogf.org/About/abt_policies.php>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.ogf.org/pipermail/dfdl-wg/attachments/20140724/43a904bb/attachment.html>