Comments from Ian and Steve: 1) Is it a schema error if default/fixed attributes specified along with dfdl:inputValueCalc and/or dfdl:outputValueCalc? 2) 2D array. - dfdl:occurrences() is not in the expression language in draft 031. Is something missing from the language, or should the XPath count() function be used here? - $dfdl:occurrences - $ not needed - dfdl:outputValueCalc for 'ncols' - we think the else clause should be '..\rows[1]\cols' 3) PD date - As an example, it's perhaps not a good one as we have decimalCalendarFormat as a property of a decimal number, which is intended to do exactly this - As it stands, it will need updating to reflect latest decimal supplement Regards, Steve Steve Hanson Programming Model Architect WebSphere Message Brokers Hursley, UK Internet: smh@uk.ibm.com Phone (+44)/(0) 1962-815848 "Mike Beckerle" <mbeckerle.dfdl@gmail.com> Sent by: dfdl-wg-bounces@ogf.org 09/04/2008 02:44 Please respond to mbeckerle.dfdl@gmail.com To Alan Powell/UK/IBM@IBMGB cc dfdl-wg@ogf.org, dfdl-wg-bounces@ogf.org Subject Re: [DFDL-WG] DFDL: Calculated Values section rewrite I?ve attached a revised calculated value properties doc which incorporates suggestions from Alan, specifically, there?s a new example, which is a 2-d array with nrows, ncols fields stored before it. I think this motivates the connection between outputValueCalc, and number of occurrences and occurs calculations nicely. ?mikeb From: Alan Powell [mailto:alan_powell@uk.ibm.com] Sent: Thursday, March 27, 2008 2:02 PM To: mbeckerle.dfdl@gmail.com Cc: dfdl-wg@ogf.org; dfdl-wg-bounces@ogf.org Subject: Re: [DFDL-WG] DFDL: Calculated Values section rewrite Mike A couple of comments on the using derived/representation nomenclature with OutputValueCalc and a couple of minor corrections. However I thought the Length Prefix example a bit odd as I would have expected a single HexBinary element rather than an array of bytes. Alan Powell MP 211, IBM UK Labs, Hursley, Winchester, SO21 2JN, England Notes Id: Alan Powell/UK/IBM email: alan_powell@uk.ibm.com Tel: +44 (0)1962 815073 Fax: +44 (0)1962 816898 From: "Mike Beckerle" <mbeckerle.dfdl@gmail.com> To: <dfdl-wg@ogf.org> Date: 26/03/2008 16:39 Subject: [DFDL-WG] DFDL: Calculated Values section rewrite My deliverable for the next draft (32) was to revise the calculated values section. I have rewritten it and the draft is attached. Of note: I have removed the troublesome ?outputLengthCalc? property, as I no longer see a critical need for it. One of the examples computes the number of occurrences for a byte array, and I think that mechanism along with alignment is sufficient to handle the troublesome cases I was considering where size of padding had to be dynamically computed. The section now consists of a short table of definition, followed by illustrative examples, however, I think this is fine. The semantics of inputValueCalc and outputValueCalc aren?t really that complex. They can be described in a paragraph. It is the motivation for them that is complicated, so I think examples in the spec, while sometimes considered problematic, are OK in this case. [attachment "calculated-value-properties.doc" deleted by Alan Powell/UK/IBM] -- 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 -- 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