Re: [xsl] How do I determine that an item is a numeric atomic value?

[Mukul Gandhi <gandhi.mukul@xxxxxxxxx>]

Thanks, David for useful thoughts.

On Sun, Oct 3, 2010 at 3:15 PM, David Carlisle <davidc@xxxxxxxxx> wrote:
> no but they could both have been subtypes of a new numeric type sitting
> between the existing ones and xs:atomic type.

I think xs:float cannot be a true subtype of xs:double as per rules of
value spaces of XML Schema (primitive) type system, because computing
values of double and float can have rounding errors.

> but because it isn't really a type there have to be special XDM type promotion rules.

I agree.

It seems to me that you kind of suggested something like following (a
fictitious XML Schema type hierarchy tree):

xs:anyAtomicType
   -> myNumericType (base-type -> a combination of double, float)
   -> double
   -> float

So now may be as per above example, we can design (a custom-design) an
instance of "myNumericType" which is child of double and/or float.



-- 
Regards,
Mukul Gandhi