docbook-rng-5.0b1, xsl-1.69.1 (chunk) saxon-6.5.4 oXygen-6.2 Document consists of a book root with xinclude'd chapters which include nested xinclude'd sections, etc. Html rendering results in left and right navigation text ( and graphics when nav.graphics is set to 1 ) not appearing; home and parent section (up) does appear and function correctly. History: I transitioned a document that successfully validates and transforms with docbook-dtd-4.5CR1 xsl-1.69.1 saxon-6.5.4 and oXygen-6.2, transforming the xml prologs and prototypes to support Docbook-rng-5.0b1. Content was modified to support Docbook-rng ( ulink to link ns1:href, etc ) and successfully validates. The same stylesheet and stringparms are utilized. No images are utilized in the document. Below is the HTML source fragment resulting from the dtd and rng transformations: DTD: }</style><link rel="start" href="index.html" title="Foo Plan"><link rel="up" href="ch01s01.html" title="1.1. Project Summary"><link rel="prev" href="ch01s01.html" title="1.1. Project Summary"><link rel="next" href="ch01s01s01s01.html" title="1.1.1.1. Statement of Purpose"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">1.1.1. Purpose, Scope and Objectives</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch01s01.html">Prev</a> </td><th width="60%" align="center">1.1. Project Summary</th><td width="20%" align="right"> <a accesskey="n" href="ch01s01s01s01.html">Next</a></td></tr></table><hr></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="purpScopeObj"></a>1.1.1. Purpose, Scope and Objectives</h3></div> RNG: }</style><link rel="start" href="index.html" title="Foo Plan"><link rel="up" href="ch01s01.html" title="1.1. Project Summary"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">1.1.1. Purpose, Scope and Objectives</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center">1.1. Project Summary</th><td width="20%" align="right"> </td></tr></table><hr></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="purpScopeObj"></a>1.1.1. Purpose, Scope and Objectives</h3></div> Advice please. Ray