XUpdate - generating duplicate attributes

Hi,

I have a found a bug IMHO.

Then I perform the XUpdate query provided below - I got 2 strange things:

1) both xu:if statements are evaluated true (!)
2) resulted document has one more (!) attribute usageCount each time I 
perform the operation. So 10 executions => 10 attributes usageCount - I 
thought that there "can only be one" attribute with each name?

Thanks

Sebastian


<xu:modifications version="1.0" xmlns:xu="http://www.xmldb.org/xupdate"; >

   <xu:if 
test="not(document('/db/elvis/doc/1234567.xml')/Book[@usageCount])">
        <xu:append select="document('/db/elvis/doc/1234567.xml')/Book">
                        <xu:attribute name="usageCount">0</xu:attribute>
                </xu:append>
   </xu:if>

   <xu:if test="document('/db/elvis/doc/1234567.xml')/Book[@usageCount]">
   	<xu:update 
select="document('/db/elvis/doc/1234567.xml')/Book/@usageCount">'{'util:eval(concat(document('/db/elvis/doc/1234567.xml')/Book/@usageCount,"+1"))'}'</xu:update>
   </xu:if>

</xu:modifications>

--
-----------------------------------------
--   Sebastian Ryszard Kruk, M.Sc.
--   mailto: skruk@xxxxxxx
--   GG: 335067, Jabber: s_kruk@xxxxxxxxx
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