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in-scope-prefixes

The in-scope-prefixes function returns the sequence of namespace prefixes that are in scope for a given element node. This helps identify what namespace prefixes can be used for that element and its sub-elements.

Syntax

fn:in-scope-prefixes(element)

The following table describes the argument for this command:

Argument	Required/Optional	Description
element	Required	The element node whose in-scope prefixes are to be returned.

Return Value

Returns a sequence of strings representing the namespace prefixes in scope for the given element.

The sequence may contain the empty string

representing the default namespace prefix.

Returns an empty sequence if the argument is empty or not an element node.

Examples

The following table lists some sample values and return values:

SAMPLE FUNCTION	OUTPUT
fn:in-scope-prefixes(<a xmlns="http://ns1" xmlns:x="http://ns2"/>)	("", "x")
fn:in-scope-prefixes(())	Validation error. Empty sequence is not allowed as first argument to in-scope-prefixes function.