Bind variables by evaluating expressions.
A ForClause is part of FLWOR and FLWU expressions and
contains one or more variables that will be related to the expression that
follows. The for clause creates tuples from the Cartesian product
that is computed from the sequence of values which are the result of evaluating
the expression. The return clause will be invoked once for each
generated tuple that is retained after passing the optional where
clause.
To each bound variable you can associate a positional variable
that is bound at the same time. It is preceded by the keyword at
and is always of the implied type xs:integer. The positional
variable represents the ordinal position of the items in the binding sequence
over which the variable iterates, starting at 1.
See FLWORExpr for examples.
The following construct(s) refer to this construct:
This construct is also related to the following construct(s):
LetClause
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WhereClause
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