Re: XPath 1.0 or 2.0

> 1. Selecting a subtree (e.g. an element) based on a typed value
>     (e.g. a date).
> 
> 2. Comparing date & time values for selection or conditionals.
> 
> 3. Selecting a subtree based on the validated type of an element.

These are all things you could achieve by use of an XSLT 2 component.
Putting such heavyweight constructs into the pipeline language itself
greatly increases the minumum size of the run-time system.

-- Richard