I thought this was as simple as reversing the order of the bits in a byte as each byte is read/written? If not then I have not understood what it is doing. Reading through, my overall comment is that most readers will struggle to understand what this property is trying to achieve. It needs to be more accessible. I'm limiting my comments to the below for now, until I get my head round what this property is doing. "Determines the way that the positions of bits within a byte of data are interpreted for content that occupies only part of a byte, or which spans from part of one byte to part of another." I was expecting this just to say "Determines the way that the positions of bits within a byte of data are interpreted". The description needs to say when the property applies. It is not just when byteOrder applies, so I think it is to all schema components (ie, anything that can potentially have a representation in the data). Regards Steve Hanson Architect, IBM Data Format Description Language (DFDL) Co-Chair, OGF DFDL Working Group IBM SWG, Hursley, UK smh@uk.ibm.com tel:+44-1962-815848 From: Mike Beckerle <mbeckerle.dfdl@gmail.com> To: "dfdl-wg@ogf.org" <dfdl-wg@ogf.org>, Date: 08/10/2013 03:00 Subject: [DFDL-WG] bit order - proposed new erratum - response to public comment 43, action item 234 Sent by: dfdl-wg-bounces@ogf.org Attached is a MS-Word document containing my first cut at an errata to describe adding a new bitOrder property to DFDL. It is more complicated than I would like. 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 -- dfdl-wg mailing list dfdl-wg@ogf.org https://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