> However, there's
> another TODO for YEARFRAC
>
> | TODO: Applications should probably implement the other actual/actual
> | systems; we need to allocate basis numbers to them that everyone
> | agrees on.
>
> I don't think we should define other systems there, for
> interoperability's sake. I'll remove that as well if noone disagrees.
I think we should change it to a NOTE, but not REMOVE it. It's really a "TODO" for some future version of the standard. It turns out that there are other actual/actual systems, and by NOT having a standard way to access them, all spreadsheet implementations are doing a disservice to those users.
That said, we need to standardize what is standard TODAY, and later on work on standardizing extensions for the future. How about this:
Note: There are other actual/actual systems, for which currently there are no standard basis assignments. Future versions of this specification may add them.
--- David A. Wheeler
