Hi, I have two problems with my chunked HTML output on a docbook 5 project. PROBLEM 1 If your project uses xincludes with docbook, is Oxygen supposed to validate the xref links? I just tried my first xref link and am getting validation errors for xml files containing xrefs even though the XSL for html chunking/epub chunking runs fine. (i.e., I can see the hyperlink in the html output). Only Oxgen gives a validation error. In er1.xml (which is a chapter) I have this line <para> See also <xref linkend="interlude1"/></para> In i1.xml (which is a chapter) , I have this <chapter xmlns="http://docbook.org/ns/docbook" version="5.0" xml:id="interlude1"> <title>Interlude Essay 1 <author> <personname>Robert Nagle</personname> </author> </title> <para> ..... </chapter> SystemID: I:\My Documents\xml\rj3\er1.xml Engine name: oNVDL Severity: error Description: IDREF "interlude1" without matching ID Start location: 253:49 PROBLEM 2. I'm trying to figure out why the html output for chunked html files looks like this (see below). First, why is there a reference to saxon here? How do I turn this off? (Does Oxygen or docbook use some parameter that is causing this to appear? Any guess why it would make every paragraph an aref with an id which corresponds with the xml:id of the chapter element? <p> <a id="interlude1" xmlns:saxon="http://icl.com/saxon">"You have nothing to worry about."</a> </p> Thanks for your help. Robert Nagle