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14<title>The tree output</title>
15</head>
16<body bgcolor="#8b7765" text="#000000" link="#000000" vlink="#000000">
17<table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr>
18<td width="180">
19<a href="http://www.gnome.org/"><img src="smallfootonly.gif" alt="Gnome Logo"></a><a href="http://www.w3.org/Status"><img src="w3c.png" alt="W3C Logo"></a><a href="http://www.redhat.com/"><img src="redhat.gif" alt="Red Hat Logo"></a>
20</td>
21<td><table border="0" width="90%" cellpadding="2" cellspacing="0" align="center" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3" bgcolor="#fffacd"><tr><td align="center">
22<h1>The XML C library for Gnome</h1>
23<h2>The tree output</h2>
24</td></tr></table></td></tr></table></td>
25</tr></table>
26<table border="0" cellpadding="4" cellspacing="0" width="100%" align="center"><tr><td bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr>
Daniel Veillard594cf0b2001-10-25 08:09:12 +0000[diff] [blame]27<td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td>
28<table width="100%" border="0" cellspacing="1" cellpadding="3">
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]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 Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]31<li><a href="index.html">Home</a></li>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]32<li><a href="intro.html">Introduction</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]33<li><a href="FAQ.html">FAQ</a></li>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]34<li><a href="docs.html">Documentation</a></li>
35<li><a href="bugs.html">Reporting bugs and getting help</a></li>
36<li><a href="help.html">How to help</a></li>
37<li><a href="downloads.html">Downloads</a></li>
38<li><a href="news.html">News</a></li>
Daniel Veillard7b602b42002-01-08 13:26:00 +0000[diff] [blame]39<li><a href="XMLinfo.html">XML</a></li>
Daniel Veillardc9484202001-10-24 12:35:52 +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>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]43<li><a href="tree.html">The tree output</a></li>
44<li><a href="interface.html">The SAX interface</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]45<li><a href="xmldtd.html">Validation &amp; DTDs</a></li>
46<li><a href="xmlmem.html">Memory Management</a></li>
47<li><a href="encoding.html">Encodings support</a></li>
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>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]51<li><a href="entities.html">Entities or no entities</a></li>
52<li><a href="namespaces.html">Namespaces</a></li>
Daniel Veillardb8cfbd12001-10-25 10:53:28 +0000[diff] [blame]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 Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]55<li><a href="DOM.html">DOM Principles</a></li>
56<li><a href="example.html">A real example</a></li>
57<li><a href="contribs.html">Contributions</a></li>
Daniel Veillard594cf0b2001-10-25 08:09:12 +0000[diff] [blame]58<li>
59<a href="xml.html">flat page</a>, <a href="site.xsl">stylesheet</a>
60</li>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]61</ul></td></tr>
Daniel Veillard594cf0b2001-10-25 08:09:12 +0000[diff] [blame]62</table>
63<table width="100%" border="0" cellspacing="1" cellpadding="3">
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>
69<li><a href="APIfiles.html">Modules</a></li>
70<li><a href="APIsymbols.html">Symbols</a></li>
71</ul></td></tr>
72</table>
73<table width="100%" border="0" cellspacing="1" cellpadding="3">
Daniel Veillard594cf0b2001-10-25 08:09:12 +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 Veillard594cf0b2001-10-25 08:09:12 +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 Veillard594cf0b2001-10-25 08:09:12 +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 Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]83<li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml&amp;product=libxml2">Bug Tracker</a></li>
Daniel Veillard594cf0b2001-10-25 08:09:12 +0000[diff] [blame]84</ul></td></tr>
85</table>
86</td></tr></table></td>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]87<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">
88<p>The parser returns a tree built during the document analysis. The value
89returned is an <strong>xmlDocPtr</strong> (i.e., a pointer to an
90<strong>xmlDoc</strong> structure). This structure contains information such
91as the file name, the document type, and a <strong>children</strong> pointer
92which is the root of the document (or more exactly the first child under the
93root which is the document). The tree is made of <strong>xmlNode</strong>s,
94chained in double-linked lists of siblings and with a children&lt;-&gt;parent
95relationship. An xmlNode can also carry properties (a chain of xmlAttr
96structures). An attribute may have a value which is a list of TEXT or
97ENTITY_REF nodes.</p>
98<p>Here is an example (erroneous with respect to the XML spec since there
99should be only one ELEMENT under the root):</p>
100<p><img src="structure.gif" alt=" structure.gif "></p>
101<p>In the source package there is a small program (not installed by default)
102called <strong>xmllint</strong> which parses XML files given as argument and
103prints them back as parsed. This is useful for detecting errors both in XML
104code and in the XML parser itself. It has an option <strong>--debug</strong>
105which prints the actual in-memory structure of the document; here is the
106result with the <a href="#example">example</a> given before:</p>
107<pre>DOCUMENT
108version=1.0
109standalone=true
110 ELEMENT EXAMPLE
111 ATTRIBUTE prop1
112 TEXT
113 content=gnome is great
114 ATTRIBUTE prop2
115 ENTITY_REF
116 TEXT
117 content= linux too
118 ELEMENT head
119 ELEMENT title
120 TEXT
121 content=Welcome to Gnome
122 ELEMENT chapter
123 ELEMENT title
124 TEXT
125 content=The Linux adventure
126 ELEMENT p
127 TEXT
128 content=bla bla bla ...
129 ELEMENT image
130 ATTRIBUTE href
131 TEXT
132 content=linus.gif
133 ELEMENT p
134 TEXT
135 content=...</pre>
136<p>This should be useful for learning the internal representation model.</p>
Daniel Veillard3f4c40f2002-02-13 09:19:28 +0000[diff] [blame]137<p><a href="bugs.html">Daniel Veillard</a></p>
Daniel Veillardc9484202001-10-24 12:35:52 +0000[diff] [blame]138</td></tr></table></td></tr></table></td></tr></table></td>
139</tr></table></td></tr></table>
140</body>
141</html>