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Subject: RE: [ubl-lcsc] Alan Stitzer Comments on DateTime
On the whole I agree with Gunther. But I do not agree with the summary in Tim's note where it talks about Periodicity/Recurrent - I'm not sure of the actual source - whether it's Tim or Alan. It says:- The 'Particular Point of Date and/or Time' is (a.) The 'Duration' is (b.) The 'Period' is either a combination of (a.) + (b.), (a.) + (a.) or (b.) + (a.) The 'Periodicity/Recurrent' is either: - a series of (a.) within a (b.) - a series of (Period) within a (b.) - a series of (a.) within a (Period) - a series of (b.) within a (Period) which seems to imply we need to define only expressions for (a.) and (b.). To my mind Periodicity needs more than just a series of (a) or (b) - it may be unbounded, i.e. with no start, end or duration specified - it may be bounded, i.e. with a start or end or duration in combination Those are the 'bounds': then there are the 'occurrences' - dates as such do not figure as occurrences: that's just a list of dates - 'events' e.g. day names, 1st week or e.g. 15th day of the month do figure, and I think these are conceptually different to 'date'. One might need an 'occurrence period', e.g. Tuesday-to-Thursday, 15th-18th. - I think 'time' might appear connected with 'event', e.g. making "10:00hrs every Tuesday", and that this might be a time period, e.g. 10:00-to-13:00 every Tuesday. Any more thoughts, everyone? Mike Adcock Standards & Security Unit APACS - Association for Payment Clearing Services Mercury House, Triton Court 14 Finsbury Square London EC2A 1LQ Tel: +44 (0) 20 7711 6318 Fax: +44 (0) 20 7711 6299 e-mail: michael.adcock@apacs.org.uk ********************************************************************** The opinions expressed are those of the individual and not the company. Internet communications are not secure and therefore APACS does not accept legal responsibility for the contents of this message. If the reader of this message is not the intended recipient, or the employee responsible for delivering this communication to the intended recipient, you are hereby notified that any disclosure, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone to arrange for its return. Thank you. **********************************************************************
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