Dynamic context default values

[Michael Kay]

> This means that a query in XQTS like 
> simply "root()" (which is supposed to fail as it doesn't have 
> a context node) will always succeed in X-Hive. So the XQTS 
> test cases that expect a failure there are not reproducible 
> in X-Hive/DB.

Of course you can always add the feature in order to pass the test. I had to
do that once or twice myself...

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