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21<h1>The XML C library for Gnome</h1>
22<h2>FAQ</h2>
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27<table width="100%" border="0" cellspacing="1" cellpadding="3">
28<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Main Menu</b></center></td></tr>
Daniel Veillard8acca112002-01-21 09:52:27 +0000[diff] [blame]29<tr><td bgcolor="#fffacd"><ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]30<li><a href="index.html">Home</a></li>
31<li><a href="intro.html">Introduction</a></li>
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Daniel Veillard7b602b42002-01-08 13:26:00 +0000[diff] [blame]38<li><a href="XMLinfo.html">XML</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]39<li><a href="XSLT.html">XSLT</a></li>
40<li><a href="architecture.html">libxml architecture</a></li>
41<li><a href="tree.html">The tree output</a></li>
42<li><a href="interface.html">The SAX interface</a></li>
43<li><a href="xmldtd.html">Validation &amp; DTDs</a></li>
44<li><a href="xmlmem.html">Memory Management</a></li>
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51<li><a href="upgrade.html">Upgrading 1.x code</a></li>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]52<li><a href="threads.html">Thread safety</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]53<li><a href="DOM.html">DOM Principles</a></li>
54<li><a href="example.html">A real example</a></li>
55<li><a href="contribs.html">Contributions</a></li>
56<li>
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Daniel Veillard3bf65be2002-01-23 12:36:34 +0000[diff] [blame^]62<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Indexes</b></center></td></tr>
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Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]71<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr>
Daniel Veillard8acca112002-01-21 09:52:27 +0000[diff] [blame]72<tr><td bgcolor="#fffacd"><ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]73<li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li>
74<li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li>
Daniel Veillard4a859202002-01-08 11:49:22 +0000[diff] [blame]75<li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]76<li><a href="ftp://xmlsoft.org/">FTP</a></li>
77<li><a href="http://www.fh-frankfurt.de/~igor/projects/libxml/">Windows binaries</a></li>
Daniel Veillarddb9dfd92001-11-26 17:25:02 +0000[diff] [blame]78<li><a href="http://garypennington.net/libxml2/">Solaris binaries</a></li>
Daniel Veillardc6271d22001-10-27 07:50:58 +0000[diff] [blame]79<li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml">Bug Tracker</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]80</ul></td></tr>
81</table>
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83<td valign="top" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%"><tr><td><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd">
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]84<p>Table of Content:</p>
85<ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]86<li><a href="FAQ.html#Licence">Licence(s)</a></li>
87<li><a href="FAQ.html#Installati">Installation</a></li>
88<li><a href="FAQ.html#Compilatio">Compilation</a></li>
89<li><a href="FAQ.html#Developer">Developer corner</a></li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]90</ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]91<h3>
92<a name="Licence">Licence</a>(s)</h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]93<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]94<li>
95<em>Licensing Terms for libxml</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]96 <p>libxml is released under 2 (compatible) licences:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]97<ul>
98<li>the <a href="http://www.gnu.org/copyleft/lgpl.html">LGPL</a>: GNU
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]99 Library General Public License</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]100<li>the <a href="http://www.w3.org/Consortium/Legal/copyright-software-19980720.html">W3C
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]101 IPR</a>: very similar to the XWindow licence</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]102</ul>
103</li>
104<li>
105<em>Can I embed libxml in a proprietary application ?</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]106 <p>Yes. The W3C IPR allows you to also keep proprietary the changes you
107 made to libxml, but it would be graceful to provide back bugfixes and
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]108 improvements as patches for possible incorporation in the main
109 development tree</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]110</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]111</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]112<h3><a name="Installati">Installation</a></h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]113<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]114<li>Unless you are forced to because your application links with a Gnome
Daniel Veillarde0c1d722001-03-21 10:28:36 +0000[diff] [blame]115 library requiring it, <strong><span style="background-color: #FF0000">Do
116 Not Use libxml1</span></strong>, use libxml2</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]117<li>
118<em>Where can I get libxml</em>
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]119 ?
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]120 <p>The original distribution comes from <a href="ftp://rpmfind.net/pub/libxml/">rpmfind.net</a> or <a href="ftp://ftp.gnome.org/pub/GNOME/stable/sources/libxml/">gnome.org</a>
121</p>
122<p>Most linux and Bsd distribution includes libxml, this is probably the
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]123 safer way for end-users</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]124<p>David Doolin provides precompiled Windows versions at <a href="http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/ ">http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/</a>
125</p>
126</li>
127<li>
128<em>I see libxml and libxml2 releases, which one should I install ?</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]129 <ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]130<li>If you are not concerned by any existing backward compatibility
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]131 with existing application, install libxml2 only</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]132<li>If you are not doing development, you can safely install both.
133 usually the packages <a href="http://rpmfind.net/linux/RPM/libxml.html">libxml</a> and <a href="http://rpmfind.net/linux/RPM/libxml2.html">libxml2</a> are
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]134 compatible (this is not the case for development packages)</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]135<li>If you are a developer and your system provides separate packaging
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]136 for shared libraries and the development components, it is possible
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]137 to install libxml and libxml2, and also <a href="http://rpmfind.net/linux/RPM/libxml-devel.html">libxml-devel</a>
138 and <a href="http://rpmfind.net/linux/RPM/libxml2-devel.html">libxml2-devel</a>
Daniel Veillard480363b2001-03-16 22:04:15 +0000[diff] [blame]139 too for libxml2 &gt;= 2.3.0</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]140<li>If you are developing a new application, please develop against
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]141 libxml2(-devel)</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]142</ul>
143</li>
144<li>
145<em>I can't install the libxml package it conflicts with libxml0</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]146 <p>You probably have an old libxml0 package used to provide the shared
147 library for libxml.so.0, you can probably safely remove it. Anyway the
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]148 libxml packages provided on <a href="ftp://rpmfind.net/pub/libxml/">rpmfind.net</a> provides
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]149 libxml.so.0</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]150</li>
151<li>
152<em>I can't install the libxml(2) RPM package due to failed
Daniel Veillardc654d602001-05-01 12:42:26 +0000[diff] [blame]153 dependancies</em>
154 <p>The most generic solution is to refetch the latest src.rpm , and
155 rebuild it locally with</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]156<p><code>rpm --rebuild libxml(2)-xxx.src.rpm</code></p>
157<p>if everything goes well it will generate two binary rpm (one providing
Daniel Veillardc654d602001-05-01 12:42:26 +0000[diff] [blame]158 the shared libs and xmllint, and the other one, the -devel package
159 providing includes, static libraries and scripts needed to build
160 applications with libxml(2)) that you can install locally.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]161</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]162</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]163<h3><a name="Compilatio">Compilation</a></h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]164<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]165<li>
166<em>What is the process to compile libxml ?</em>
167 <p>As most UNIX libraries libxml follows the &quot;standard&quot;:</p>
168<p><code>gunzip -c xxx.tar.gz | tar xvf -</code></p>
169<p><code>cd libxml-xxxx</code></p>
170<p><code>./configure --help</code></p>
171<p>to see the options, then the compilation/installation proper</p>
172<p><code>./configure [possible options]</code></p>
173<p><code>make</code></p>
174<p><code>make install</code></p>
175<p>At that point you may have to rerun ldconfig or similar utility to
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]176 update your list of installed shared libs.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]177</li>
178<li>
179<em>What other libraries are needed to compile/install libxml ?</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]180 <p>Libxml does not requires any other library, the normal C ANSI API
181 should be sufficient (please report any violation to this rule you may
182 find).</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]183<p>However if found at configuration time libxml will detect and use the
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]184 following libs:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]185<ul>
186<li>
187<a href="http://www.info-zip.org/pub/infozip/zlib/">libz</a>
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]188 : a highly portable and available widely compression library</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]189<li>iconv: a powerful character encoding conversion library. It's
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]190 included by default on recent glibc libraries, so it doesn't need to
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]191 be installed specifically on linux. It seems it's now <a href="http://www.opennc.org/onlinepubs/7908799/xsh/iconv.html">part
192 of the official UNIX</a> specification. Here is one <a href="http://clisp.cons.org/~haible/packages-libiconv.html">implementation
193 of the library</a> which source can be found <a href="ftp://ftp.ilog.fr/pub/Users/haible/gnu/">here</a>.</li>
194</ul>
195</li>
196<li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]197<em>make check fails on some platforms</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]198 <p>Sometime the regression tests results don't completely match the value
199 produced by the parser, and the makefile uses diff to print the delta. On
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]200 some platforms the diff return breaks the compilation process, if the
201 diff is small this is probably not a serious problem</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]202</li>
203<li>
204<em>I use the CVS version and there is no configure script</em>
Daniel Veillard6761eee2001-06-11 10:29:38 +0000[diff] [blame]205 <p>The configure (and other Makefiles) are generated. Use the autogen.sh
206 script to regenerate the configure and Makefiles, like:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]207<p><code>./autogen.sh --prefix=/usr --disable-shared</code></p>
208</li>
209<li>
210<em>I have troubles when running make tests with gcc-3.0</em>
Daniel Veillard7b06bcb2001-06-22 16:03:51 +0000[diff] [blame]211 <p>It seems the initial release of gcc-3.0 has a problem with the
212 optimizer which miscompiles the URI module. Please use another
213 compiler</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]214</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]215</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]216<h3>
217<a name="Developer">Developer</a> corner</h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]218<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]219<li>
220<em>xmlDocDump() generates output on one line</em>
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]221 <p>libxml will not <strong>invent</strong> spaces in the content of a
222 document since <strong>all spaces in the content of a document are
223 significant</strong>. If you build a tree from the API and want
224 indentation:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]225<ol>
226<li>the correct way is to generate those yourself too</li>
227<li>the dangerous way is to ask libxml to add those blanks to your
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]228 content <strong>modifying the content of your document in the
229 process</strong>. The result may not be what you expect. There is
230 <strong>NO</strong> way to guarantee that such a modification won't
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]231 impact other part of the content of your document. See <a href="http://xmlsoft.org/html/libxml-parser.html#XMLKEEPBLANKSDEFAULT">xmlKeepBlanksDefault
232 ()</a> and <a href="http://xmlsoft.org/html/libxml-tree.html#XMLSAVEFORMATFILE">xmlSaveFormatFile
233 ()</a>
234</li>
235</ol>
236</li>
237<li>Extra nodes in the document:
Daniel Veillard62bccd52001-02-10 09:40:10 +0000[diff] [blame]238 <p><em>For a XML file as below:</em></p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]239<pre>&lt;?xml version=&quot;1.0&quot;?&gt;
240&lt;PLAN xmlns=&quot;http://www.argus.ca/autotest/1.0/&quot;&gt;
241&lt;NODE CommFlag=&quot;0&quot;/&gt;
242&lt;NODE CommFlag=&quot;1&quot;/&gt;
Daniel Veillard62bccd52001-02-10 09:40:10 +0000[diff] [blame]243&lt;/PLAN&gt;</pre>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]244<p><em>after parsing it with the function
Daniel Veillard480363b2001-03-16 22:04:15 +0000[diff] [blame]245 pxmlDoc=xmlParseFile(...);</em></p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]246<p><em>I want to the get the content of the first node (node with the
247 CommFlag=&quot;0&quot;)</em></p>
248<p><em>so I did it as following;</em></p>
249<pre>xmlNodePtr pode;
Daniel Veillard62bccd52001-02-10 09:40:10 +0000[diff] [blame]250pnode=pxmlDoc-&gt;children-&gt;children;</pre>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]251<p><em>but it does not work. If I change it to</em></p>
252<pre>pnode=pxmlDoc-&gt;children-&gt;children-&gt;next;</pre>
253<p><em>then it works. Can someone explain it to me.</em></p>
254<p>
255<p>In XML all characters in the content of the document are significant
Daniel Veillard7f41b3e2001-02-10 09:35:37 +0000[diff] [blame]256 <strong>including blanks and formatting line breaks</strong>.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]257<p>The extra nodes you are wondering about are just that, text nodes with
Daniel Veillard7f41b3e2001-02-10 09:35:37 +0000[diff] [blame]258 the formatting spaces wich are part of the document but that people tend
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]259 to forget. There is a function <a href="http://xmlsoft.org/html/libxml-parser.html">xmlKeepBlanksDefault
Daniel Veillard7f41b3e2001-02-10 09:35:37 +0000[diff] [blame]260 ()</a> to remove those at parse time, but that's an heuristic, and its
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]261 use should be limited to case where you are sure there is no
262 mixed-content in the document.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]263</li>
264<li>
265<em>I get compilation errors of existing code like when accessing
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]266 <strong>root</strong> or <strong>childs fields</strong> of nodes</em>
Daniel Veillard3f3b4f32001-03-13 15:12:39 +0000[diff] [blame]267 <p>You are compiling code developed for libxml version 1 and using a
268 libxml2 development environment. Either switch back to libxml v1 devel or
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]269 even better fix the code to compile with libxml2 (or both) by <a href="upgrade.html">following the instructions</a>.</p>
270</li>
271<li>
272<em>I get compilation errors about non existing
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]273 <strong>xmlRootNode</strong> or <strong>xmlChildrenNode</strong>
274 fields</em>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]275 <p>The source code you are using has been <a href="upgrade.html">upgraded</a> to be able to compile with both libxml
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]276 and libxml2, but you need to install a more recent version:
277 libxml(-devel) &gt;= 1.8.8 or libxml2(-devel) &gt;= 2.1.0</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]278</li>
279<li>
280<em>XPath implementation looks seriously broken</em>
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]281 <p>XPath implementation prior to 2.3.0 was really incomplete, upgrade to
282 a recent version, the implementation and debug of libxslt generated fixes
Daniel Veillard480363b2001-03-16 22:04:15 +0000[diff] [blame]283 for most obvious problems.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]284</li>
285<li>
286<em>The example provided in the web page does not compile</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]287 <p>It's hard to maintain the documentation in sync with the code
Daniel Veillarde9202a02000-10-16 16:58:19 +0000[diff] [blame]288 &lt;grin/&gt; ...</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]289<p>Check the previous points 1/ and 2/ raised before, and send
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]290 patches.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]291</li>
292<li>
293<em>Where can I get more examples and informations than in the web
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]294 page</em>
295 <p>Ideally a libxml book would be nice. I have no such plan ... But you
296 can:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]297<ul>
298<li>check more deeply the <a href="html/libxml-lib.html">existing
299 generated doc</a>
300</li>
301<li>looks for examples of use for libxml function using the Gnome code
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]302 for example the following will query the full Gnome CVs base for the
303 use of the <strong>xmlAddChild()</strong> function:
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]304 <p><a href="http://cvs.gnome.org/lxr/search?string=xmlAddChild">http://cvs.gnome.org/lxr/search?string=xmlAddChild</a></p>
305<p>This may be slow, a large hardware donation to the gnome project
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]306 could cure this :-)</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]307</li>
308<li>
309<a href="http://cvs.gnome.org/bonsai/rview.cgi?cvsroot=/cvs/gnome&amp;dir=gnome-xml">Browse
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]310 the libxml source</a>
311 , I try to write code as clean and documented as possible, so
312 looking at it may be helpful</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]313</ul>
314</li>
315<li>What about C++ ?
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]316 <p>libxml is written in pure C in order to allow easy reuse on a number
317 of platforms, including embedded systems. I don't intend to convert to
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]318 C++.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]319<p>There is however a C++ wrapper provided by Ari Johnson
Daniel Veillarde9202a02000-10-16 16:58:19 +0000[diff] [blame]320 &lt;ari@btigate.com&gt; which may fullfill your needs:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]321<p>Website: <a href="http://lusis.org/~ari/xml++/">http://lusis.org/~ari/xml++/</a>
322</p>
323<p>Download: <a href="http://lusis.org/~ari/xml++/libxml++.tar.gz">http://lusis.org/~ari/xml++/libxml++.tar.gz</a>
324</p>
325</li>
326<li>How to validate a document a posteriori ?
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]327 <p>It is possible to validate documents which had not been validated at
328 initial parsing time or documents who have been built from scratch using
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]329 the API. Use the <a href="http://xmlsoft.org/html/libxml-valid.html#XMLVALIDATEDTD">xmlValidateDtd()</a>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]330 function. It is also possible to simply add a Dtd to an existing
331 document:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]332<pre>xmlDocPtr doc; /* your existing document */
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]333 xmlDtdPtr dtd = xmlParseDTD(NULL, filename_of_dtd); /* parse the DTD */
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]334 dtd-&gt;name = xmlStrDup((xmlChar*)&quot;root_name&quot;); /* use the given root */
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]335
Daniel Veillarde9202a02000-10-16 16:58:19 +0000[diff] [blame]336 doc-&gt;intSubset = dtd;
337 if (doc-&gt;children == NULL) xmlAddChild((xmlNodePtr)doc, (xmlNodePtr)dtd);
338 else xmlAddPrevSibling(doc-&gt;children, (xmlNodePtr)dtd);
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]339 </pre>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]340</li>
341<li>etc ...</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]342</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]343<p>
Daniel Veillardc5d64342001-06-24 12:13:24 +0000[diff] [blame]344<p><a href="mailto:daniel@veillard.com">Daniel Veillard</a></p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]345</td></tr></table></td></tr></table></td></tr></table></td>
346</tr></table></td></tr></table>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]347</body>
348</html>