>>>>> "Martin" == Martin Honnen <Martin.Honnen@xxxxxx> writes:

    Martin> Error in XPath 2.0 expression at as C:\path\sheet.xml Line
    Martin> 10, Character 29

    Martin> Type error, value does not match a required type as
    Martin> specified by the matching rules in 2.5.4 SequenceType
    Martin> Matching. - 'xs:anyAtomicType?'


    Martin> Line 10 is <xsl:param name="date" as="xs:anyAtomicType?"/>
    Martin> so, as far as I understand it, Altova complains about
    Martin> passing in an element to the function having an
    Martin> 'xs:anyAtomicType?' parameter.


    Martin> What do you think, is that a bug in AltovaXML?

Looks like it to me.
The type should be xs:untypedAtomic (assuming no validation), which is
a subtype of xs:anyAtomicType.
-- 
Colin Adams
Preston Lancashire