RE: testing for string and number in XSLT 2.0 was Re:

>         y variable value(so we know we are selecting it): 3123123
>         Test y as string:true
>         Test y as integer:true
> 
> back to my original question, how can I test if a value is a string or
> integer (with the very real constraint of data not being 
> explicitly typed).
> 

If the data is untyped then ($x castable as xs:string) will always be true.
If the string consists of digits then ($x castable as xs:integer) will also
be true, as your experiments show.

Michael Kay
http://www.saxonica.com/