The ATG platform supports output properties that are defined by the <xsl:output> element in an XSL stylesheet. The XSLT standard specification ( and the ATG platform implementation differ in some important respects. The default values for several of the attributes are changed to match the existing ATG platform behavior, so XSL stylesheets without an <xsl:output> element use default values from the request-handling pipeline, instead of those defined in the XSLT standard. The most important changes are for the encoding, method and mediatype attributes.