Hi Mike One extra thought post-call, caused by thinking about the FinalUnused part of a sequence. Some fixed length choices have a rule that each branch of the choice must be of equal length. This results in unused bytes for branches shorter than the maximum. In a bitstream instance, a user will see these bytes. Perhaps the grammar should acknowledge their existence, even if there are no DFDL properties to express the bytes (like FinalUnused)? Regards, Steve Steve Hanson WebSphere Message Brokers Hursley, UK Internet: smh@uk.ibm.com Phone (+44)/(0) 1962-815848 Mike Beckerle <beckerle@us.ibm.com> Sent by: dfdl-wg-bounces@ogf.org 10/11/2007 00:16 To dfdl-wg@ogf.org cc Subject [DFDL-WG] Grammar as adapted to infoset I took a crack at this. I ripped it out of the main document for faster review/turnaround. I think this matches the latest infoset email diagram. Mike Beckerle STSM, Architect, Scalable Computing IBM Software Group Information Platform and Solutions Westborough, MA 01581 direct: voice and FAX 508-599-7148 assistant: Pam Riordan priordan@us.ibm.com 508-599-7046 -- dfdl-wg mailing list dfdl-wg@ogf.org http://www.ogf.org/mailman/listinfo/dfdl-wg Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU