Tamino XQuery User Guide - Software AG Documentation

FLWOR Expressions
The order by and return Clauses
The mandatory return clause determines the result of the whole FLWOR expression. It is invoked
for every tuple that is retained after evaluating the where clause. In the expression contained in
the where clause you can use any variable bindings of the current FLWOR expression. As you can
see from the join example above, this is also the place to use element constructors for tailoring
your result.
If there is no order by clause, the order of the tuple stream is determined by the for and let
clauses. Otherwise the tuples in the tuple stream are reordered in a new, value-based order. In
either case, the resulting order determines the order in which the return clause is evaluated, once
for each tuple, using the variable bindings in the respective tuples.
If the values to be compared are strings, you can specify the collation to be used (if no collation is
specified, the default collation is used.)
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XQuery User Guide