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root

Returns the root of the tree that contains the argument.

Syntax

fn:root(arg)

The following table describes the argument:

Argument	Required/ Optional	Description
arg	Required	The node whose root node will be returned.

Return Value

The

fn:root

function returns a document node if the

$arg

node is part of a document. However, it returns an element if the

$arg

node is not part of a document.

$arg

is the empty sequence, the empty sequence is returned.

If the function is called without an argument, the context item is used as the default argument. If the context item is undefined or is not a node, an error occurs.

Example

Assume that you have the following variable definition:

let $in-xml := <a><x>123</x></a>

The expression

root($in-xml/x)

returns the following result:

<a>
  <x>123</x>
</a>

XML Nodes functions

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Table of Contents

Design

Design

root

root

Syntax

Return Value

Example