I have found a problem with the comparison and minimum of xs:dateTime values.
Here are minimal test documents, first the XML input which has a list of 'item' elements with xs:dateTime values:
2009-01-01T12:00:00Z 2009-02-01T12:00:00Z 2010-10-01T12:00:00Z 2010-12-01T12:00:00Z
Now in the stylesheet I want to find the minimum dateTime item element of those item elements which are greater than the current dateTime:
