| Daniel Veillard | 1177ca4 | 2003-04-26 22:29:54 +0000 | [diff] [blame] | 1 | <?xml version="1.0" encoding="ISO-8859-1"?> |
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| Daniel Veillard | f781dba | 2006-06-09 13:34:49 +0000 | [diff] [blame^] | 10 | </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" 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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 value |
| 11 | returned is an <strong>xmlDocPtr</strong> (i.e., a pointer to an |
| 12 | <strong>xmlDoc</strong> structure). This structure contains information such |
| 13 | as the file name, the document type, and a <strong>children</strong> pointer |
| 14 | which is the root of the document (or more exactly the first child under the |
| 15 | root which is the document). The tree is made of <strong>xmlNode</strong>s, |
| 16 | chained in double-linked lists of siblings and with a children<->parent |
| 17 | relationship. An xmlNode can also carry properties (a chain of xmlAttr |
| 18 | structures). An attribute may have a value which is a list of TEXT or |
| 19 | ENTITY_REF nodes.</p><p>Here is an example (erroneous with respect to the XML spec since there |
| 20 | should 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) |
| 21 | called <strong>xmllint</strong> which parses XML files given as argument and |
| 22 | prints them back as parsed. This is useful for detecting errors both in XML |
| 23 | code and in the XML parser itself. It has an option <strong>--debug</strong> |
| 24 | which prints the actual in-memory structure of the document; here is the |
| 25 | result with the <a href="#example">example</a> given before:</p><pre>DOCUMENT |
| Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 26 | version=1.0 |
| 27 | standalone=true |
| 28 | ELEMENT EXAMPLE |
| 29 | ATTRIBUTE prop1 |
| 30 | TEXT |
| 31 | content=gnome is great |
| 32 | ATTRIBUTE prop2 |
| 33 | ENTITY_REF |
| 34 | TEXT |
| 35 | content= linux too |
| 36 | ELEMENT head |
| 37 | ELEMENT title |
| 38 | TEXT |
| 39 | content=Welcome to Gnome |
| 40 | ELEMENT chapter |
| 41 | ELEMENT title |
| 42 | TEXT |
| 43 | content=The Linux adventure |
| 44 | ELEMENT p |
| 45 | TEXT |
| 46 | content=bla bla bla ... |
| 47 | ELEMENT image |
| 48 | ATTRIBUTE href |
| 49 | TEXT |
| 50 | content=linus.gif |
| 51 | ELEMENT p |
| 52 | TEXT |
| Daniel Veillard | 1177ca4 | 2003-04-26 22:29:54 +0000 | [diff] [blame] | 53 | 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> |