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22 <h1>The XML C library for Gnome</h1>
23 <h2>The tree output</h2>
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98 <p>The parser returns a tree built during the document analysis. The value
99 returned is an <strong>xmlDocPtr</strong> (i.e., a pointer to an
100 <strong>xmlDoc</strong> structure). This structure contains information such
101 as the file name, the document type, and a <strong>children</strong> pointer
102 which is the root of the document (or more exactly the first child under the
103 root which is the document). The tree is made of <strong>xmlNode</strong>s,
104 chained in double-linked lists of siblings and with a children<->parent
105 relationship. An xmlNode can also carry properties (a chain of xmlAttr
106 structures). An attribute may have a value which is a list of TEXT or
107 ENTITY_REF nodes.</p>
108 <p>Here is an example (erroneous with respect to the XML spec since there
109 should be only one ELEMENT under the root):</p>
110 <p><img src="structure.gif" alt=" structure.gif "></p>
111 <p>In the source package there is a small program (not installed by default)
112 called <strong>xmllint</strong> which parses XML files given as argument and
113 prints them back as parsed. This is useful for detecting errors both in XML
114 code and in the XML parser itself. It has an option <strong>--debug</strong>
115 which prints the actual in-memory structure of the document; here is the
116 result with the <a href="#example">example</a> given before:</p>
123 content=gnome is great
131 content=Welcome to Gnome
135 content=The Linux adventure
138 content=bla bla bla ...
146 <p>This should be useful for learning the internal representation model.</p>
147 <p><a href="bugs.html">Daniel Veillard</a></p>
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