Chapter 1. XPath functions

Chapter 1. XPath functions
	Part I. Native XPath 1.0 support

Table of Contents

1. Extension functions
2. Java™ methods as extension functions

All the standard XPath 1.0 functions are supported: boolean, ceiling, concat, contains, count, false, floor, id, lang, last, local-name, name, namespace-uri, normalize-space, not, number, position, round, starts-with, string, string-length, substring, substring-after, substring-before, sum, translate, true.

The following XSLT 1.0 functions are also supported: current, document, format-number, system-property, key, generate-id, function-available, element-available, unparsed-entity-uri with the following specificities:

In document(relative_URI), relative_URI is not resolved against the URI of the XSLT stylesheet (because there is no such XSLT stylesheet).
The 3-argument form of format-number() is not supported.
key() always returns an empty node-set when used outside a XED script or a Schematron.
element-available() returns true for any element name in the "http://www.w3.org/1999/XSL/Transform" namespace and false otherwise.
unparsed-entity-uri() always returns an empty string.
system-property() supports the following XSLT 1.0 properties: xsl:version, xsl:vendor, xsl:vendor-url, and also the following XSLT 2.0 properties: xsl:product-name, xsl:product-version, in addition to Java™'s system properties.