FunctX XQuery Functions

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fn:count

The number of items in a sequence

Description

The fn:count function returns the number of items in a sequence, as an xs:integer.

This description is © Copyright 2007, O'Reilly Media. It is excerpted from the book XQuery by Priscilla Walmsley, O'Reilly, 2007. For a complete explanation of this function, please refer to Appendix A of the book.

Arguments and Return Type

Name	Type	Description
`$arg`	`item()*`	the sequence of items to count
return value	`xs:integer`

Examples

`let $ordDoc :=`	doc('http://www.functx.com/input/order.xml')
`return`

XQuery Example	Results
`count( (1, 2, 3) )`	`3`
`count($ordDoc//item)`	`6`
`count( distinct-values($ordDoc//item/@num))`	`4`
`count( (1, 2, 3, () ) )`	`3`
`count( () )`	`0`

History

Published On	Last Updated	Contributor(s)
2006-06-27	2007-02-26	W3C, XQuery 1.0 and XPath 2.0 Functions and Operators, http://www.w3.org/TR/xpath-functions/

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