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Subject: Re: [office-formula] YEARFRAC again

On Mon, 2007-29-01 at 17:54 +0100, Eike Rathke wrote:
> Hi Andreas,
> On Friday, 2007-01-26 13:50:34 -0700, Andreas J. Guelzow wrote:
> > > 1. Documents exported to Excel using the new semantics don't work there
> > >    and at its best generate an error. Ok, nothing strange, maybe users
> > >    can live with it.
> > > 
> > > 2. Much worse, if Excel defined the same number with a different meaning
> > >    ex/imported documents silently work different. Most certainly nothing
> > >    users would like to live with.
> > >    
> > > We can prevent both by not defining new basis numbers.
> > 
> > Well, no, this does not prevent conflict. Applications will (and in
> > other areas already have) define behaviours and functions that go beyond
> > what one can do in Excel. So there is a potential for conflict. Avoiding
> > any specification for items not defined by Excel just means that we add
> > conflicts between other applications.
> > 
> > Since Excel does not support ODF we can in fact address the Excel
> > compatibility when we open Excel files
> That's easier said than done. While it works for single value arguments,
> you can't remap an argument's value in an import filter if the argument
> is calculated.

Why?  I can't just remap one constant to another but I could clearly
construct a function wrapper on import.
> > so that is not a good reason to
> > invite compatibility issues between applications such as Gnumeric.
> > OpenOffice.org and KSpread!
> Did any of these applications add a new basis number definition for
> YEARFRAC so far? Is there a need for it?

Excel hasn't added anything lately either. I believe it much more likely
that Gnumeric will add new basis numbers than Excel.

I hope we have _not_ adopted the idea of building a standard that is
fully compatible with Excel.


Andreas J. Guelzow, Professor
Dept. of Mathematical & Computing Sciences
Concordia University College of Alberta

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