Hi! My editor is correctly flagging the reference to an undefined user-defined function with arity 2. It happens I have extended my XSLT processor with this functionality, so I want to teach oXygen about the existence of the function so that it won't complain. In my environment, the stylesheet runs without error, so I don't need the tool to tell me the reference is in error. Where do I do that? Thanks! . . . . . . Ken -- Contact info, blog, articles, etc. http://www.CraneSoftwrights.com/x/ | Check our site for free XML, XSLT, XSL-FO and UBL developer resources | Streaming hands-on XSLT/XPath 2 training class @US$125 (5 hours free) | Essays (UBL, XML, etc.) http://www.linkedin.com/today/author/gkholman |