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*Subject*: **Re: [office-formula] Constraints and infix ^**

*From*:**Andreas J Guelzow <aguelzow@math.concordia.ab.ca>***To*: office-formula@lists.oasis-open.org*Date*: Tue, 13 Jan 2009 12:10:40 -0700

Hi Patrick, On Tue, 2009-01-13 at 13:40 -0500, Patrick Durusau wrote: > Andreas J Guelzow wrote: > > <snip> > >> According to your reading, we have prohibited 0^0 and then in a > >> following paragraph mandated it but don't define the result. > >> > >> If it is prohibited, there is no valid result. (full stop) > >> > > > > There has to be a result. > > > > If a user uses 0^0 some value _must_ be returned. > > > > > Note that I said "no valid result." What result it should return is up > to the formula standard to define. I guess we are just disagreeing on language. To me, an "error" is a valid result. > > Since it violates the constraint imho it should be an Error. I guess the > > draft wants to allow other values (namely 0 or 1 as continuous > > continuations of related functions) but prohibit anything else. > > > > Personally I think it should always return an error. > > > > > OK, but the draft also says (6.1, under constraints): > > > * > > > > If a constraint is not met, the function/operator *should* > > return an Error unless otherwise noted. > > > That makes it appear (whether intended or not) that > applications/implementations when executing a function/operator defined > by OpenFormula can violate any constraint and not return an error. > Unless the definition of a function/operator gives a specific > instruction on what to do in the case of a constraint violation. > > That seems like an odd result. As I say, that is probably a mis-reading > but it is one allowed by the text as written. I think we may in fact be agreeing: the draft as currently written allows virtually arbitrary return values if the constraints are not satisfied. It seems that neither you nor I think that that is a good idea. Note that for this little expression 0^0 we currently have the following return values in: Gnumeric 1.9.4 and earlier #NUM! (so it returns an error) Openoffice3 1 (well...) Kspread 1.6.3 1 (well...) Andreas -- Andreas J Guelzow <aguelzow@math.concordia.ab.ca> Concordia University College of Alberta

**Follow-Ups**:**Re: [office-formula] Constraints and infix ^***From:*Patrick Durusau <patrick@durusau.net>

**References**:**Constraints and infix ^***From:*Patrick Durusau <patrick@durusau.net>

**Re: [office-formula] Constraints and infix ^***From:*Andreas J Guelzow <aguelzow@math.concordia.ab.ca>

**Re: [office-formula] Constraints and infix ^***From:*Patrick Durusau <patrick@durusau.net>

**Re: [office-formula] Constraints and infix ^***From:*Andreas J Guelzow <aguelzow@math.concordia.ab.ca>

**Re: [office-formula] Constraints and infix ^***From:*Patrick Durusau <patrick@durusau.net>