XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (397 page)

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Authors: Michael Kay

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Note that if a default namespace for elements has been set up, then the only way to select those elements whose namespace URI is null is to include a predicate that tests the result of the
namespace-uri()
function.

Examples of Name Tests

Expression
Description
*
Matches any name. If
*
is used on its own, it represents the step
child::*
, which selects all child elements of the context node, regardless of their name.
xt:*
Matches any name in the namespace bound to the prefix
xt
. If
xt:*
is used on its own, it represents the step
child::xt:*
, which selects all child elements of the context node that are in the namespace bound to the prefix
xt
.
title
Matches a node whose local name is name
title
and whose namespace URI is null, unless a default namespace for elements has been established in the context (and then, only when the axis is not the attribute or namespace axis).

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