Thanks, Joerg. I replaced the old xalan with Xalan-J 2.4.1 and the transformation works, except for a problem with CSS.
For subsequent newbies looking for a setup that works, here's what I am using. Cocoon 2.0.3 with jre 1.3.1_06 DocBook XML DTD 4.2 DocBook XSL 1.5 The following .jar files are in the cocoon/WEB-INF/lib xalan-2.4.1.jar xalan2.jar (docbook extensions from Norm) xercesImpl-2.0.0.jar xml-apis.jar --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]