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For 3.10.7, in the examples the first line of the Output Tuple Stream is: ($storeno = S101, $itemno = (<itemno>P78395</itemno>, <itemno>P41653<itemno>)) The 2nd itemno element constructor in this does not have a '/' char in the (intended) close tag - the line should be as follows: ($storeno = S101, $itemno = (<itemno>P78395</itemno>, <itemno>P41653</itemno>)) Though minor, this issue causes a problem for the XMLSpectrum syntax-highlighter which adds syntax-highlighting to the XQuery 3.0 samples.
Thanks for reporting. I fixed this - the fix will show up in the next build.