Hi Andreas, On Tuesday, 2007-11-27 00:20:05 +0100, Andreas wrote:
> > Ah, yes, the dark chapter of day count algorithms.. in the OASIS > > OpenDocument Format Formula specification subcommittee we struggle with > > that as well, namely for the YEARFRAC() function and all related > > financial functions that are based on it. > > > > Google produces some links, the most recent of which seems to be > > http://jackwaugh.com/it/openformula-20070125.html#6.9.23.YEARFRAC|outline > > which is not even on oasis-open.org. Since I didn't find anything more > recent, > I am referring to this source. Actually that's a copy of an old and way outdated revision of the ODFF draft, for recent revisions please see http://www.oasis-open.org/committees/documents.php?wg_abbrev=office-formula However, the YEARFRAC algorithm uncertainty isn't fully clarified yet. > Some day count conventions differ only slightly -- and only in some > particular > cases. So I think it will not be enough to literally describe the > conventions. It will not be enough to use identifiers such as act/act, 30/360 > etc., either. At least some of them do not seem to be defined by a normative > source and different sources associate different conventions with these > identifiers -- or vice versa. As soon as we clearly identified the algorithms in question we'll of course add details and references. > But even if there are normative sources -- not everybody will always have > easy > access to them. We'd been delighted if there was any normative reference on YEARFRAC. > I guess OO, in particular calc will implement the OpenFormula specification. Sure. I'll work on that the next months. > Do you have any noncommittal indication about when the specification might be > finalized -- and be implemented by OO? Roughly estimated spec finalization is scheduled for Q1 next year, followed by public review phases and so on. Implementation is ongoing for OOo3.0 and 3.1 > The source given above indicates, that OO 2.0.3 already has a yearfrac > function. I have OO 2.0.4 but it doesn't know yearfrac...? Well, I have a > german version, maybe the function has a different name which I cannot find > out. It's named BRTEILJAHRE in German. > (It might be a good idea to >not< translate function names... Usually users want function names to be translated, especially if they're used to localized function names in another spreadsheet application. > at least to > always support the English names in any language whatsoever.) That won't work as you can never be sure how localization projects would translate a function's name and that might clash with an English name of a different function. Future versions might have a mechanism to switch to English names though, but not mixed localized and English names. Eike -- OOo/SO Calc core developer. Number formatter stricken i18n transpositionizer. SunSign 0x87F8D412 : 2F58 5236 DB02 F335 8304 7D6C 65C9 F9B5 87F8 D412 OpenOffice.org Engineering at Sun: http://blogs.sun.com/GullFOSS Please don't send personal mail to the [EMAIL PROTECTED] account, which I use for mailing lists only and don't read from outside Sun. Use [EMAIL PROTECTED] Thanks.
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