4448 2007-04-03 10:24:24 +0000 [FO] Return type of op:subtract-dateTimes, op:subtract-dates, op:subtract-times 2007-11-16 09:12:56 +0000 1 1 1 Unclassified XPath / XQuery / XSLT Functions and Operators 1.0 Recommendation PC Windows NT CLOSED FIXED P2 normal --- 1 tim mike bungeman public-qt-comments oldest_to_newest 14647 0 tim 2007-04-03 10:24:24 +0000 The signatures of: op:subtract-dateTimes op:subtract-dates op:subtract-times all have xs:dayTimeDuration? return type. Unless I'm mistaken, these functions can never return the empty sequence and should therefore have return type xs:dayTimeDuration, 14670 1 mike 2007-04-04 12:23:06 +0000 I think you are correct. Of course, these functions are only an internal formalism so there is no direct effect on users. 14733 2 mike 2007-04-16 21:25:14 +0000 The WGs agreed today to make the change of removing the "?" from the result type signature of these functions. I am therefore closing the bug report. Michael Kay for the XSL and XQuery WGs 14958 3 mike 2007-05-01 22:15:38 +0000 For the record, op:subtract-times appears to have the correct signature already; the other two are wrong. Michael Kay 16094 4 mike 2007-08-09 15:34:03 +0000 *** Bug 4927 has been marked as a duplicate of this bug. *** 17767 5 mike 2007-11-16 09:12:56 +0000 This will appear as erratum FO.E5