DevGuru XSLT element xsl:call-template



			ELEMENT: xsl:call-template <xsl:call-template name="qname" > </xsl:call-template> The xsl:call-template element is used to invoke a template by name. By invoke, we mean that the named template is called and applied to the source document. If a template does not have a name, it cannot be called by this element. The xsl:template element is used to create a template. You can name a template by using the name attribute of the xsl:template element. Further, the name called by the mandatory name attribute of the xsl:call-template element must match the name specified by the name attribute of the xsl:template element. Complicating matters is the fact that a template is not required to have a name. A template is only required to have either a name or match attribute. (It can have both.) Ideally, each template will have a unique name. However, if a name is repeated, then the two templates must have a different import precedence (refer to the xsl:import element), otherwise it is an error. An xsl:call-template element cannot directly return a result. You need to enclose the xsl:call-template element inside an xsl:variable element which serves as the current output destination (see code example). The xsl:call-template element can contain zero or more xsl:with-param elements. It cannot contain any other XSLT elements. These xsl:with-param elements will only be evaluated if there is a matching xsl:param element in the template being called. If there is no such match, then the xsl:with-param element is simply ignored. This is not a self-closing element. The separate closing element is mandatory. name="qname" The mandatory name attribute is the unique qname of the template that you wish to invoke. A qname is a qualified name that is composed of an optional namespace prefix, a colon which is only present if there is a prefix, and a mandatory XML name (for example, xsl:zipcode or zipcode). This name must match the name used by the name attribute of the xsl:template element that was used originally to create the template. We use the DevGuru Staff List XML file for our example with the following header: <?xml-stylesheet type="text/xsl" href="xslt_example_calltemplate.xsl"?> and we name it: xslt_example_calltemplate.xml Code for xslt_example_calltemplate.xsl: <xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0"> <xsl:variable name="hoo"> <html> <body> <xsl:call-template name="boo"> <xsl:with-param name="name" /> <xsl:with-param name="dob" /> </xsl:call-template> </body> </html> </xsl:variable> <xsl:template name="boo" match="/"> <xsl:param name="name" /> <xsl:param name="dob" /> <xsl:for-each select="devguru_staff/programmer"> <div> NAME: <xsl:value-of select="name" /> <br /> DOB: <xsl:value-of select="dob" /> <hr /> </div> </xsl:for-each> </xsl:template> </xsl:stylesheet> Output: Click to view output in separate window - requires Internet Explorer