XSL transformation error

Question

Hello everybody,
I'm tryin' to transform a simple xml file via xslt within a simple java class. Following an excerpt of the java class.
TransformerFactory factory = TransformerFactory.newInstance();
Transformer transformer = null;
Templates template = null;
StreamSource xmlSource = null;
StreamSource xslSource = null;
StreamResult result = null;
try {
     // a new StreamSource from a file name
     xmlSource = new StreamSource(new File("Y:\temp\input\index.xml"));
     xslSource = new StreamSource(new File("Y:\temp\transformation.xslt"));
     // a new StreamResult to a file name (it is automatically
     //closed on exit)
     result = new StreamResult("data/cars1.html");
     // get a new Templates object for this stylesheet
     template = factory.newTemplates(xslSource);
     // get a new Transformer from the Templates
     transformer = template.newTransformer();
     // perform the transformation
     transformer.transform(xmlSource, result);
catch(Exception e){
When debugging the class I receive the error message
<b>ERROR:  'Syntax error in '($processedChildren, $nextChild)'.'
FATAL ERROR:  'The template couldn't be compiled.'</b>
The expression mentioned in the error message in an excerpt from the XSLT file. The entire expression in the file looks as follows
<xsl:when test="empty(index-of($processedChildren,$nextChild))">
I'm currently using NetWeaver 2004 with JDK 1.4.
Anybody got any suggestions for this problem? Maybe it's due to the index-of function. I'm not quite sure if it's an XPath 2.0 function.
Thanks in advance,
Benjamin

Answer 1

Hi Jens,
processedChildren is a sequence of string objects, nextChild is a string. With the test I'm trying to check whether the string is contained in the sequence. If not, the function empty() returns true. Index-of returns the index numbers of the string, where the string occurs in the sequence.
Both functions are part of the XPath 2.0 standard
<a href="http://www.w3.org/TR/xpath-functions">http://www.w3.org/TR/xpath-functions</a>