https://svn.boost.org/trac10/ticket/2571 <p> libs/asio/doc/asio.qbk contains this: </p> <pre class="wiki">[template mdash[] '''&amp;mdash; '''] </pre><p> Use of the mdash template causes these errors when building boost's docs: </p> <pre class="wiki">../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:469: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:480: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:493: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:504: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:516: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:527: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:540: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:565: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:580: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:590: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:612: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:623: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:635: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:650: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:667: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:679: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:688: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:689: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:695: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:707: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:756: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:769: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:846: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:852: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:857: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6917: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6924: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6934: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6938: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6942: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6950: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:6957: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7181: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7183: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7279: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7281: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7371: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7373: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7463: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:7465: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8131: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8132: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8205: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8206: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8279: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8280: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8347: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:8348: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10108: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10109: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10188: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10189: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10319: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10320: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10393: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10394: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10467: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10468: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10535: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:10536: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:11206: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:11207: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:11286: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:11287: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:12749: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:12750: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:12829: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:12830: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:12958: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:12959: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:13037: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:13038: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:13170: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:13171: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:13252: parser error : Entity 'mdash' not defined ../bin.v2/libs/asio/doc/gcc-4.3/debug/asio_doc.xml:13253: parser error : Entity 'mdash' not defined </pre><p> mdash may be a valid HTML entity, but it is not a valid XML entity. </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/2571 Trac 1.4.3 chris_kohlhoff Thu, 16 Apr 2009 10:59:59 GMT https://svn.boost.org/trac10/ticket/2571#comment:1 https://svn.boost.org/trac10/ticket/2571#comment:1 <ul> <li><strong>status</strong> <span class="trac-field-old">new</span> → <span class="trac-field-new">closed</span> </li> <li><strong>resolution</strong> → <span class="trac-field-new">worksforme</span> </li> </ul> <p> Hmm, I do not get those errors and the release's documentation is also displaying the entity just fine. The entity mdash is defined in the file docbook-dtd-4.2/ent/iso-pub.ent. Perhaps your docbook installation is unable to locate that file correctly? </p> Ticket