Last modified on 14 April 2011, at 16:42

XQuery/Sequences Module

MotivationEdit

You want to perform a function on a sequence. You can one of the following functions: map, fold or filter.

MethodEdit

Here is the structure of these three functions.

  sequences:map($func as function, $seqA as item()*, $seqB as item()*) as item()*
  sequences:fold($func as function, $seq as item()*, $start as item())
  sequences:filter($func as function, $seq as item()*) as item()*

Each of them takes an XQuery function as the first argument.

MapEdit

The map function applies the function item $f to every item from the sequence $seq in turn, returning the concatenation of the resulting sequences in order.

W3C Page on Map

FoldEdit

FilterEdit