[bdbxml] Problems with queries

Hi,
 
I have some problems with doing queries. I use the release 2.1.8, but I
had the same problem with an earlier release.
For the container I use an alias and when I want to do this query:
 
            collection('')distinct-values(/*/Node3)
 
I get the following error:
 
            com.sleepycat.dbxml.XmlException: Error: Error in XQuery
expression: Unrecognized character 'd' (0x64), line 1, column 16,
errcode = XPATH_PARSER_ERROR
 
What did I make wrong. It stays like this in the GettingStarted with
Berkeley DB XML for Java.
When I use this query:
 
            collection('')/*/Node3/text()
 
it works. This is XPath isn't it. And the query below is XQuery? But why
doesn'n it work??
 
Thanks for your help.
Maike