<?xml version="1.0" encoding="iso-8859-1"?> <?xml-stylesheet href="../../make-menu.xsl" type="text/xsl"?><html> <head> <this-is section="extensions" page="output-extras" subpage="supply-source-locator"/> <!-- Generated at 2011-12-09T20:47:22.916Z--><title>Saxonica: XSLT and XQuery Processing: The saxon:supply-source-locator attribute</title> <meta name="coverage" content="Worldwide"/> <meta name="copyright" content="Copyright Saxonica Ltd"/> <meta name="title" content="Saxonica: XSLT and XQuery Processing: The saxon:supply-source-locator attribute"/> <meta name="robots" content="noindex,nofollow"/> <link rel="stylesheet" href="../../saxondocs.css" type="text/css"/> </head> <body class="main"> <h1>The saxon:supply-source-locator attribute</h1> <p>This attribute is relevant only when output is sent to a user-written <code>ContentHandler</code>, that is, a <code>SAXResult</code>. It causes extra information to be maintained and made available to the <code>ContentHandler</code> for diagnostic purposes: specifically, the <code>Locator</code> that is passed to the <code>ContentHandler</code> via the <code>setDocumentLocator</code> method may be cast to a <code>ContentHandlerProxyLocator</code>, which exposes the method <code>getContextItemStack()</code>. This returns a <code>java.util.Stack</code>. The top item on the stack is the current context item, and below this are previous context items. Each item is represented by the interface <code>net.sf.saxon.om.Item</code>. If the item is a node, and if the node is one derived by parsing a source document with the line-numbering option enabled, then it is possible to obtain the URI and line number of this node in the original XML source.</p> <p>For this to work, the code must be compiled with tracing enabled. This can be achieved by setting the option <code>config.setCompileWithTracing(true)</code> on the <code>Configuration</code> object, or equivalently by setting the property <code>FeatureKeys.COMPILE_WITH_TRACING</code> on the JAXP <code>TransformerFactory</code>. Note that this compile-time option imposes a substantial run-time overhead, even if tracing is not switched on at run-time by providing a <code>TraceListener</code>.</p> <table width="100%"> <tr> <td> <p align="right"><a class="nav" href="suppress-indentation.xml">Next</a></p> </td> </tr> </table> </body> </html>