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14<title>FAQ</title>
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22<h1>The XML C library for Gnome</h1>
23<h2>FAQ</h2>
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29<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]30<tr><td bgcolor="#fffacd"><ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]31<li><a href="index.html">Home</a></li>
32<li><a href="intro.html">Introduction</a></li>
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Daniel Veillard7b602b42002-01-08 13:26:00 +0000[diff] [blame]39<li><a href="XMLinfo.html">XML</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]40<li><a href="XSLT.html">XSLT</a></li>
Daniel Veillard6dbcaf82002-02-20 14:37:47 +0000[diff] [blame]41<li><a href="python.html">Python and bindings</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]42<li><a href="architecture.html">libxml architecture</a></li>
43<li><a href="tree.html">The tree output</a></li>
44<li><a href="interface.html">The SAX interface</a></li>
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46<li><a href="xmlmem.html">Memory Management</a></li>
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48<li><a href="xmlio.html">I/O Interfaces</a></li>
49<li><a href="catalog.html">Catalog support</a></li>
50<li><a href="library.html">The parser interfaces</a></li>
51<li><a href="entities.html">Entities or no entities</a></li>
52<li><a href="namespaces.html">Namespaces</a></li>
53<li><a href="upgrade.html">Upgrading 1.x code</a></li>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]54<li><a href="threads.html">Thread safety</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]55<li><a href="DOM.html">DOM Principles</a></li>
56<li><a href="example.html">A real example</a></li>
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Daniel Veillard3bf65be2002-01-23 12:36:34 +0000[diff] [blame]64<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Indexes</b></center></td></tr>
65<tr><td bgcolor="#fffacd"><ul>
Daniel Veillardf8592562002-01-23 17:58:17 +0000[diff] [blame]66<li><a href="APIchunk0.html">Alphabetic</a></li>
Daniel Veillard3bf65be2002-01-23 12:36:34 +0000[diff] [blame]67<li><a href="APIconstructors.html">Constructors</a></li>
68<li><a href="APIfunctions.html">Functions/Types</a></li>
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70<li><a href="APIsymbols.html">Symbols</a></li>
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Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]74<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]75<tr><td bgcolor="#fffacd"><ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]76<li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li>
77<li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li>
Daniel Veillard4a859202002-01-08 11:49:22 +0000[diff] [blame]78<li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li>
Daniel Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]79<li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]80<li><a href="ftp://xmlsoft.org/">FTP</a></li>
81<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]82<li><a href="http://garypennington.net/libxml2/">Solaris binaries</a></li>
Daniel Veillarde6d8e202002-05-02 06:11:10 +0000[diff] [blame]83<li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li>
Daniel Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]84<li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml&amp;product=libxml2">Bug Tracker</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]85</ul></td></tr>
86</table>
87</td></tr></table></td>
88<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]89<p>Table of Content:</p>
90<ul>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]91<li><a href="FAQ.html#License">License(s)</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]92<li><a href="FAQ.html#Installati">Installation</a></li>
93<li><a href="FAQ.html#Compilatio">Compilation</a></li>
94<li><a href="FAQ.html#Developer">Developer corner</a></li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]95</ul>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]96<h3>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]97<a name="License">License</a>(s)</h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]98<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]99<li>
100<em>Licensing Terms for libxml</em>
Daniel Veillardc575b992002-02-08 13:28:40 +0000[diff] [blame]101 <p>libxml is released under the <a href="http://www.opensource.org/licenses/mit-license.html">MIT
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]102 License</a>, see the file Copyright in the distribution for the precise
Daniel Veillardc575b992002-02-08 13:28:40 +0000[diff] [blame]103 wording</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]104</li>
105<li>
106<em>Can I embed libxml in a proprietary application ?</em>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]107 <p>Yes. The MIT License allows you to also keep proprietary the changes
108 you made to libxml, but it would be graceful to provide back bug fixes and
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]109 improvements as patches for possible incorporation in the main
110 development tree</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]111</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]112</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]113<h3><a name="Installati">Installation</a></h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]114<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]115<li>Unless you are forced to because your application links with a Gnome
Daniel Veillarde0c1d722001-03-21 10:28:36 +0000[diff] [blame]116 library requiring it, <strong><span style="background-color: #FF0000">Do
117 Not Use libxml1</span></strong>, use libxml2</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]118<li>
Daniel Veillardaf43f632002-03-08 15:05:20 +0000[diff] [blame]119<em>Where can I get libxml</em> ?
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>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]122<p>Most Linux and BSD distributions include libxml, this is probably the
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]123 safer way for end-users</p>
Daniel Veillard9b6fd302002-05-13 12:06:47 +0000[diff] [blame]124<p>David Doolin provides precompiled Windows versions at <a href="http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/%20%20%20%20%20%20%20%20%20">http://www.ce.berkeley.edu/~doolin/code/libxmlwin32/</a>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]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 Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]153 dependencies</em>
154 <p>The most generic solution is to re-fetch the latest src.rpm , and
Daniel Veillardc654d602001-05-01 12:42:26 +0000[diff] [blame]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>
Daniel Veillardaf43f632002-03-08 15:05:20 +0000[diff] [blame]187<a href="http://www.info-zip.org/pub/infozip/zlib/">libz</a> : a
188 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 Veillard63d83142002-05-20 06:51:05 +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
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]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
Daniel Veillarde46182c2002-02-12 14:29:11 +0000[diff] [blame]201 diff is small this is probably not a serious problem.</p>
202<p>Sometimes (especially on Solaris) make checks fails due to limitations
203 in make. Try using GNU-make instead.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]204</li>
205<li>
206<em>I use the CVS version and there is no configure script</em>
Daniel Veillard6761eee2001-06-11 10:29:38 +0000[diff] [blame]207 <p>The configure (and other Makefiles) are generated. Use the autogen.sh
208 script to regenerate the configure and Makefiles, like:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]209<p><code>./autogen.sh --prefix=/usr --disable-shared</code></p>
210</li>
211<li>
212<em>I have troubles when running make tests with gcc-3.0</em>
Daniel Veillard7b06bcb2001-06-22 16:03:51 +0000[diff] [blame]213 <p>It seems the initial release of gcc-3.0 has a problem with the
214 optimizer which miscompiles the URI module. Please use another
215 compiler</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]216</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]217</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]218<h3>
219<a name="Developer">Developer</a> corner</h3>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]220<ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]221<li>
222<em>xmlDocDump() generates output on one line</em>
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]223 <p>libxml will not <strong>invent</strong> spaces in the content of a
224 document since <strong>all spaces in the content of a document are
225 significant</strong>. If you build a tree from the API and want
226 indentation:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]227<ol>
228<li>the correct way is to generate those yourself too</li>
229<li>the dangerous way is to ask libxml to add those blanks to your
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]230 content <strong>modifying the content of your document in the
231 process</strong>. The result may not be what you expect. There is
232 <strong>NO</strong> way to guarantee that such a modification won't
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]233 impact other part of the content of your document. See <a href="http://xmlsoft.org/html/libxml-parser.html#XMLKEEPBLANKSDEFAULT">xmlKeepBlanksDefault
234 ()</a> and <a href="http://xmlsoft.org/html/libxml-tree.html#XMLSAVEFORMATFILE">xmlSaveFormatFile
235 ()</a>
236</li>
237</ol>
238</li>
239<li>Extra nodes in the document:
Daniel Veillard62bccd52001-02-10 09:40:10 +0000[diff] [blame]240 <p><em>For a XML file as below:</em></p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]241<pre>&lt;?xml version=&quot;1.0&quot;?&gt;
242&lt;PLAN xmlns=&quot;http://www.argus.ca/autotest/1.0/&quot;&gt;
243&lt;NODE CommFlag=&quot;0&quot;/&gt;
244&lt;NODE CommFlag=&quot;1&quot;/&gt;
Daniel Veillard62bccd52001-02-10 09:40:10 +0000[diff] [blame]245&lt;/PLAN&gt;</pre>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]246<p><em>after parsing it with the function
Daniel Veillard480363b2001-03-16 22:04:15 +0000[diff] [blame]247 pxmlDoc=xmlParseFile(...);</em></p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]248<p><em>I want to the get the content of the first node (node with the
249 CommFlag=&quot;0&quot;)</em></p>
250<p><em>so I did it as following;</em></p>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]251<pre>xmlNodePtr pnode;
Daniel Veillard62bccd52001-02-10 09:40:10 +0000[diff] [blame]252pnode=pxmlDoc-&gt;children-&gt;children;</pre>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]253<p><em>but it does not work. If I change it to</em></p>
254<pre>pnode=pxmlDoc-&gt;children-&gt;children-&gt;next;</pre>
255<p><em>then it works. Can someone explain it to me.</em></p>
256<p>
257<p>In XML all characters in the content of the document are significant
Daniel Veillard7f41b3e2001-02-10 09:35:37 +0000[diff] [blame]258 <strong>including blanks and formatting line breaks</strong>.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]259<p>The extra nodes you are wondering about are just that, text nodes with
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]260 the formatting spaces which are part of the document but that people tend
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]261 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]262 ()</a> to remove those at parse time, but that's an heuristic, and its
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]263 use should be limited to case where you are sure there is no
264 mixed-content in the document.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]265</li>
266<li>
267<em>I get compilation errors of existing code like when accessing
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]268 <strong>root</strong> or <strong>childs fields</strong> of nodes</em>
Daniel Veillard3f3b4f32001-03-13 15:12:39 +0000[diff] [blame]269 <p>You are compiling code developed for libxml version 1 and using a
270 libxml2 development environment. Either switch back to libxml v1 devel or
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]271 even better fix the code to compile with libxml2 (or both) by <a href="upgrade.html">following the instructions</a>.</p>
272</li>
273<li>
274<em>I get compilation errors about non existing
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]275 <strong>xmlRootNode</strong> or <strong>xmlChildrenNode</strong>
276 fields</em>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]277 <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]278 and libxml2, but you need to install a more recent version:
279 libxml(-devel) &gt;= 1.8.8 or libxml2(-devel) &gt;= 2.1.0</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]280</li>
281<li>
282<em>XPath implementation looks seriously broken</em>
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]283 <p>XPath implementation prior to 2.3.0 was really incomplete, upgrade to
Daniel Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]284 a recent version, there is no known bug in the current version.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]285</li>
286<li>
287<em>The example provided in the web page does not compile</em>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]288 <p>It's hard to maintain the documentation in sync with the code
Daniel Veillarde9202a02000-10-16 16:58:19 +0000[diff] [blame]289 &lt;grin/&gt; ...</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]290<p>Check the previous points 1/ and 2/ raised before, and send
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]291 patches.</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]292</li>
293<li>
294<em>Where can I get more examples and informations than in the web
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]295 page</em>
296 <p>Ideally a libxml book would be nice. I have no such plan ... But you
297 can:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]298<ul>
299<li>check more deeply the <a href="html/libxml-lib.html">existing
300 generated doc</a>
301</li>
302<li>looks for examples of use for libxml function using the Gnome code
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]303 for example the following will query the full Gnome CVS base for the
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]304 use of the <strong>xmlAddChild()</strong> function:
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]305 <p><a href="http://cvs.gnome.org/lxr/search?string=xmlAddChild">http://cvs.gnome.org/lxr/search?string=xmlAddChild</a></p>
306<p>This may be slow, a large hardware donation to the gnome project
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]307 could cure this :-)</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]308</li>
309<li>
310<a href="http://cvs.gnome.org/bonsai/rview.cgi?cvsroot=/cvs/gnome&amp;dir=gnome-xml">Browse
Daniel Veillardaf43f632002-03-08 15:05:20 +0000[diff] [blame]311 the libxml source</a> , I try to write code as clean and documented
Daniel Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]312 as possible, so looking at it may be helpful. Especially the code of
313 xmllint.c and of the various testXXX.c tests programs should provide
314 good example on how to do things with the library.</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]315</ul>
316</li>
317<li>What about C++ ?
Daniel Veillard008186f2001-09-13 14:24:44 +0000[diff] [blame]318 <p>libxml is written in pure C in order to allow easy reuse on a number
319 of platforms, including embedded systems. I don't intend to convert to
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]320 C++.</p>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]321<p>There is however a few C++ wrappers which may fulfill your needs:</p>
Daniel Veillard9b6fd302002-05-13 12:06:47 +0000[diff] [blame]322<ul>
323<li>by Ari Johnson &lt;ari@btigate.com&gt;:
324 <p>Website: <a href="http://lusis.org/~ari/xml%2B%2B/">http://lusis.org/~ari/xml++/</a>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]325</p>
Daniel Veillard9b6fd302002-05-13 12:06:47 +0000[diff] [blame]326<p>Download: <a href="http://lusis.org/~ari/xml%2B%2B/libxml%2B%2B.tar.gz">http://lusis.org/~ari/xml++/libxml++.tar.gz</a>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]327</p>
328</li>
Daniel Veillard9b6fd302002-05-13 12:06:47 +0000[diff] [blame]329<li>by Peter Jones &lt;pjones@pmade.org&gt;
330 <p>Website: <a href="http://pmade.org/pjones/software/xmlwrapp/">http://pmade.org/pjones/software/xmlwrapp/</a>
331</p>
332</li>
333</ul>
334</li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]335<li>How to validate a document a posteriori ?
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]336 <p>It is possible to validate documents which had not been validated at
337 initial parsing time or documents who have been built from scratch using
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]338 the API. Use the <a href="http://xmlsoft.org/html/libxml-valid.html#XMLVALIDATEDTD">xmlValidateDtd()</a>
Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame^]339 function. It is also possible to simply add a DTD to an existing
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]340 document:</p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]341<pre>xmlDocPtr doc; /* your existing document */
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]342 xmlDtdPtr dtd = xmlParseDTD(NULL, filename_of_dtd); /* parse the DTD */
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]343 dtd-&gt;name = xmlStrDup((xmlChar*)&quot;root_name&quot;); /* use the given root */
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]344
Daniel Veillarde9202a02000-10-16 16:58:19 +0000[diff] [blame]345 doc-&gt;intSubset = dtd;
346 if (doc-&gt;children == NULL) xmlAddChild((xmlNodePtr)doc, (xmlNodePtr)dtd);
347 else xmlAddPrevSibling(doc-&gt;children, (xmlNodePtr)dtd);
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]348 </pre>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]349</li>
350<li>etc ...</li>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]351</ol>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]352<p>
Daniel Veillard3f4c40f2002-02-13 09:19:28 +0000[diff] [blame]353<p><a href="bugs.html">Daniel Veillard</a></p>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]354</td></tr></table></td></tr></table></td></tr></table></td>
355</tr></table></td></tr></table>
Daniel Veillardaf743792000-07-01 11:49:28 +0000[diff] [blame]356</body>
357</html>