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| </style><title>The tree output</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr><td width="120"><a href="http://swpat.ffii.org/"><img src="epatents.png" alt="Action against software patents" /></a></td><td width="180"><a href="http://www.gnome.org/"><img src="gnome2.png" alt="Gnome2 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><div align="left"><a href="http://xmlsoft.org/"><img src="Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" /></a></div></td><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"><h1>The XML C parser and toolkit of Gnome</h1><h2>The tree output</h2></td></tr></table></td></tr></table></td></tr></table><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><td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Developer Menu</b></center></td></tr><tr><td bgcolor="#fffacd"><form action="search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="20" value="" /><input name="submit" type="submit" value="Search ..." /></form><ul><li><a href="index.html" style="font-weight:bold">Main Menu</a></li><li><a href="html/index.html" style="font-weight:bold">Reference Manual</a></li><li><a href="examples/index.html" style="font-weight:bold">Code Examples</a></li><li><a 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bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd"><p>The parser returns a tree built during the document analysis. The |
| valuereturned is an <strong>xmlDocPtr</strong>(i.e., a pointer to |
| an<strong>xmlDoc</strong>structure). This structure contains information |
| suchas the file name, the document type, and a |
| <strong>children</strong>pointerwhich is the root of the document (or more |
| exactly the first child under theroot which is the document). The tree is |
| made of <strong>xmlNode</strong>s,chained in double-linked lists of siblings |
| and with a children<->parentrelationship. An xmlNode can also carry |
| properties (a chain of xmlAttrstructures). An attribute may have a value |
| which is a list of TEXT orENTITY_REF nodes.</p><p>Here is an example (erroneous with respect to the XML spec since |
| thereshould be only one ELEMENT under the root):</p><p><img src="structure.gif" alt=" structure.gif " /></p><p>In the source package there is a small program (not installed by |
| default)called <strong>xmllint</strong>which parses XML files given as |
| argument andprints them back as parsed. This is useful for detecting errors |
| both in XMLcode and in the XML parser itself. It has an option |
| <strong>--debug</strong>which prints the actual in-memory structure of the |
| document; here is theresult with the <a href="#example">example</a>given |
| before:</p><pre>DOCUMENT |
| version=1.0 |
| standalone=true |
| ELEMENT EXAMPLE |
| ATTRIBUTE prop1 |
| TEXT |
| content=gnome is great |
| ATTRIBUTE prop2 |
| ENTITY_REF |
| TEXT |
| content= linux too |
| ELEMENT head |
| ELEMENT title |
| TEXT |
| content=Welcome to Gnome |
| ELEMENT chapter |
| ELEMENT title |
| TEXT |
| content=The Linux adventure |
| ELEMENT p |
| TEXT |
| content=bla bla bla ... |
| ELEMENT image |
| ATTRIBUTE href |
| TEXT |
| content=linus.gif |
| ELEMENT p |
| TEXT |
| content=...</pre><p>This should be useful for learning the internal representation model.</p><p><a href="bugs.html">Daniel Veillard</a></p></td></tr></table></td></tr></table></td></tr></table></td></tr></table></td></tr></table></body></html> |
