Re: [xml-dev] What are the characteristics of a good type systemfor XML?

["J.Pietschmann" <j3322ptm@yahoo.de>]

Dare Obasanjo wrote:
> the (a + b) + c !=  a + (b + c) problem if a is an xs:date
> and b and c are durations,

You can have (a + b) + c !=  a + (b + c) with IEEE 754 floating
point numbers too. Calendar algebra isn't as easy as everybody
seems to think it should be, otherwise we'd have a standard for
it for years. In particular it seems to be impossible to
make it obey some axioms which hold for mathematical numbers.
That's not all that unusual. Get over it.

J.Pietschmann