Re: question about subtyping and type annotations

On Friday 24 February 2006 16:57, you wrote:
> > Section 3.12.5 Constructor Functions seems to be pretty clear
> > about it:
>
> That only says they are equivalent to casts. Are casts exempt from the
> general rule of substitutability, which says that any expression can return
> a value whose dynamic type is a subtype of the required type?

Another question is what the negative impact, if any, is when returning say 
xs:byte when xs:integer is the static type(apart from Per Bothner's confusion 
when investigating these corner cases).


		Frans