Subject: Re: [xsl] Doing Math on Durations and Creating dayTimeDuration Instances From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Thu, 6 Oct 2016 16:01:16 -0000 |
> A lot of people miss this one. By providing a convenient operator for this common operation, > we ensured that people searching the function library wouldn't find it... > > Michael Kay > Saxonica The reason is the "op:some-descriptiveName" convention created totally unreadable document that requires a lot of effort to understand what each name actually means: 10.8 Arithmetic Operators on Durations, Dates and Times 10.8.1 op:subtract-dateTimes 10.8.2 op:subtract-dates 10.8.3 op:subtract-times 10.8.4 op:add-yearMonthDuration-to-dateTime 10.8.5 op:add-dayTimeDuration-to-dateTime 10.8.6 op:subtract-yearMonthDuration-from-dateTime 10.8.7 op:subtract-dayTimeDuration-from-dateTime 10.8.8 op:add-yearMonthDuration-to-date 10.8.9 op:add-dayTimeDuration-to-date 10.8.10 op:subtract-yearMonthDuration-from-date 10.8.11 op:subtract-dayTimeDuration-from-date 10.8.12 op:add-dayTimeDuration-to-time 10.8.13 op:subtract-dayTimeDuration-from-time In the above (TOC of the W3C XPath 2.0 F & O standard), the subtraction " - " of twodateTime values is difficult to find and understand even though it is the first in the list and must be the easiest to see. I think that the above is a very effective encryption of the contents of the document. On Thu, Oct 6, 2016 at 7:02 AM, Michael Kay mike@xxxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > A lot of people miss this one. By providing a convenient operator for this common operation, we ensured that people searching the function library wouldn't find it... > > Michael Kay > Saxonica > >> On 6 Oct 2016, at 13:37, Eliot Kimber ekimber@xxxxxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: >> >> I think that's what I missed: I didn't realize you could do arithmetic >> that directly. >> >> I'll try it. >> >> Cheers, >> >> Eliot >> -- >> Eliot Kimber >> http://contrext.com >> >> >> >> >> >> >> >> On 10/6/16, 12:24 PM, "Jirka Kosek jirka@xxxxxxxx" >> <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: >> >>> On Thu, Oct 6, 2016, at 11:40, Eliot Kimber ekimber@xxxxxxxxxxxx wrote: >>>> I'm using XSLT to extract timing information from logs in order to >>>> determine the duration of actions. Each log item has a time stamp in the >>>> usual format (2016-10-05T15:52:17.525:+0200). >>> >>> And why are you simply not just subtracting two dateTimes, something >>> like: >>> >>> xs:dateTime("2015-01-01T12:00:00Z") - >>> xs:dateTime("2014-07-10T12:00:00Z") >>> >>> This will give you back duration. Or perhaps I have misunderstood... >>> >>> Jirka >>> >>> -- >>> ------------------------------------------------------------------ >>> Jirka Kosek e-mail: jirka@xxxxxxxx http://xmlguru.cz >>> ------------------------------------------------------------------ >>> Professional XML consulting and training services >>> DocBook customization, custom XSLT/XSL-FO document processing >>> ------------------------------------------------------------------ >>> OASIS DocBook TC member, W3C Invited Expert, ISO JTC1/SC34 member >>> ------------------------------------------------------------------ >>> >>> >> > -- Cheers, Dimitre Novatchev --------------------------------------- Truly great madness cannot be achieved without significant intelligence. --------------------------------------- To invent, you need a good imagination and a pile of junk ------------------------------------- Never fight an inanimate object ------------------------------------- To avoid situations in which you might make mistakes may be the biggest mistake of all ------------------------------------ Quality means doing it right when no one is looking. ------------------------------------- You've achieved success in your field when you don't know whether what you're doing is work or play ------------------------------------- To achieve the impossible dream, try going to sleep. ------------------------------------- Facts do not cease to exist because they are ignored. ------------------------------------- Typing monkeys will write all Shakespeare's works in 200yrs.Will they write all patents, too? :) ------------------------------------- Sanity is madness put to good use. ------------------------------------- I finally figured out the only reason to be alive is to enjoy it.
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