Return subsequence of a sequence.

Related Syntax Constructs

The following construct(s) refer to this construct:

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Syntax

fn:subsequence(sequence $sequence, double $start) => sequence

fn:subsequence(sequence $sequence, double $start, double $length) => sequence

Description

This function returns a subsequence of $sequence, which begins at $start and contains the next $length entries, if a third parameter is provided.

Argument

$sequence	sequence
$start	double value: the position at which the subsequence starts
$length	double value: the length of the subsequence

Examples

• Return all entries starting from the 5^th:

  let $seq := (1,2,3,4,5,6,7)
  return subsequence($seq,5)

  This returns (5,6,7).

• Return three entries starting from the 2^nd:

  let $seq := (1,2,3,4,5,6,7)
  return subsequence($seq,2,3)

  This returns (2,3,4).