[xquery-talk] What do people do about warnings?

Michael Kay mike at saxonica.com
Fri Jan 12 11:48:10 PST 2007

> The really odd thing was that
>   let $w := (trace($node, $message))
>   return if ($w) then () else ()
> Causes a fatal error when $node is a sequence of items (in 
> this case a pair of URIs as in ($uri1, $uri2) in which both 
> were of type xs:anyURI.  

Evaluating the effective boolean value of any sequence of atomic values of
length greater than one is a dynamic error! That's nothing to do with

Michael Kay

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