All standard XSLT elements are in the http://www.w3.org/1999/XSL/Transform namespace. In this chapter, we assume that this URI is mapped to the xsl prefix using an appropriate xmlns:xsl declaration somewhere in the stylesheet. This mapping is normally declared on the root element, like this:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <!-- XSLT top-level elements go here --> </xsl:stylesheet>
