Subject: RE: [xsl] xslt 2. Date arithmetic. From: "Pawson, David" <David.Pawson@xxxxxxxxxxx> Date: Wed, 2 Mar 2005 08:32:25 -0000 |
Thanks Pieter, David, for the answers: -----Original Message----- From: Michael Kay The difference between two dates is a dayTimeDuration (if they're in the same timezone - the usual case - then it will be an integer number of days). Great. No problem with that. Since the output is for humans can I cast that to something sensible? I was trying to get yearMonthDuration. Subtraction of dates to give a yearMonthDuration - the old subtractDateTimesYieldingYearMonthDuration - has been removed (as befits any function with such a ridiculous name) because it proved too difficult to specify it. OK, but the functionality of that seems reasonable? For example, would you expect 2005-02-28 minus 2005-01-31 to be one month, on the basis that 2005-01-31 plus one month is 2005-02-28? But surely the difference between these two dates is the same as 2004-02-28 minus 2004-01-31? Subtle, but I can see the problem. How long is a month? Depending what you actually want to achieve, the best approach is probably to extract the year/month components (year-from-date(), month-from-date()) and manipulate the values yourself. which matches DC's suggestion? OK, I'll play with that. Thanks Michael. regards DaveP -- DISCLAIMER: NOTICE: The information contained in this email and any attachments is confidential and may be privileged. If you are not the intended recipient you should not use, disclose, distribute or copy any of the content of it or of any attachment; you are requested to notify the sender immediately of your receipt of the email and then to delete it and any attachments from your system. RNIB endeavours to ensure that emails and any attachments generated by its staff are free from viruses or other contaminants. However, it cannot accept any responsibility for any such which are transmitted. We therefore recommend you scan all attachments. Please note that the statements and views expressed in this email and any attachments are those of the author and do not necessarily represent those of RNIB. RNIB Registered Charity Number: 226227 Website: http://www.rnib.org.uk
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