Daniel Veillard | 43d3f61 | 2001-11-10 11:57:23 +0000 | [diff] [blame] | 1 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd"> |
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| 14 | <title>The SAX interface</title> |
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| 16 | <body bgcolor="#8b7765" text="#000000" link="#000000" vlink="#000000"> |
| 17 | <table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr> |
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| 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> |
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| 22 | <h1>The XML C library for Gnome</h1> |
| 23 | <h2>The SAX interface</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 Veillard | 594cf0b | 2001-10-25 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> |
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Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 29 | <tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Main Menu</b></center></td></tr> |
Daniel Veillard | 8acca11 | 2002-01-21 09:52:27 +0000 | [diff] [blame] | 30 | <tr><td bgcolor="#fffacd"><ul> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 31 | <li><a href="index.html">Home</a></li> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 32 | <li><a href="intro.html">Introduction</a></li> |
Daniel Veillard | b8cfbd1 | 2001-10-25 10:53:28 +0000 | [diff] [blame] | 33 | <li><a href="FAQ.html">FAQ</a></li> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 34 | <li><a href="docs.html">Documentation</a></li> |
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Daniel Veillard | 7b602b4 | 2002-01-08 13:26:00 +0000 | [diff] [blame] | 39 | <li><a href="XMLinfo.html">XML</a></li> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 40 | <li><a href="XSLT.html">XSLT</a></li> |
Daniel Veillard | 6dbcaf8 | 2002-02-20 14:37:47 +0000 | [diff] [blame] | 41 | <li><a href="python.html">Python and bindings</a></li> |
Daniel Veillard | b8cfbd1 | 2001-10-25 10:53:28 +0000 | [diff] [blame] | 42 | <li><a href="architecture.html">libxml architecture</a></li> |
Daniel Veillard | c948420 | 2001-10-24 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 Veillard | b8cfbd1 | 2001-10-25 10:53:28 +0000 | [diff] [blame] | 45 | <li><a href="xmldtd.html">Validation & 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 Veillard | c948420 | 2001-10-24 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 Veillard | b8cfbd1 | 2001-10-25 10:53:28 +0000 | [diff] [blame] | 53 | <li><a href="upgrade.html">Upgrading 1.x code</a></li> |
Daniel Veillard | 52dcab3 | 2001-10-30 12:51:17 +0000 | [diff] [blame] | 54 | <li><a href="threads.html">Thread safety</a></li> |
Daniel Veillard | c948420 | 2001-10-24 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 Veillard | fc59c09 | 2002-06-05 14:48:26 +0000 | [diff] [blame] | 58 | <li><a href="tutorial/index.html">Tutorial</a></li> |
Daniel Veillard | 594cf0b | 2001-10-25 08:09:12 +0000 | [diff] [blame] | 59 | <li> |
| 60 | <a href="xml.html">flat page</a>, <a href="site.xsl">stylesheet</a> |
| 61 | </li> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 62 | </ul></td></tr> |
Daniel Veillard | 594cf0b | 2001-10-25 08:09:12 +0000 | [diff] [blame] | 63 | </table> |
| 64 | <table width="100%" border="0" cellspacing="1" cellpadding="3"> |
Daniel Veillard | 3bf65be | 2002-01-23 12:36:34 +0000 | [diff] [blame] | 65 | <tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Indexes</b></center></td></tr> |
| 66 | <tr><td bgcolor="#fffacd"><ul> |
Daniel Veillard | f859256 | 2002-01-23 17:58:17 +0000 | [diff] [blame] | 67 | <li><a href="APIchunk0.html">Alphabetic</a></li> |
Daniel Veillard | 3bf65be | 2002-01-23 12:36:34 +0000 | [diff] [blame] | 68 | <li><a href="APIconstructors.html">Constructors</a></li> |
| 69 | <li><a href="APIfunctions.html">Functions/Types</a></li> |
| 70 | <li><a href="APIfiles.html">Modules</a></li> |
| 71 | <li><a href="APIsymbols.html">Symbols</a></li> |
| 72 | </ul></td></tr> |
| 73 | </table> |
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Daniel Veillard | 594cf0b | 2001-10-25 08:09:12 +0000 | [diff] [blame] | 75 | <tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr> |
Daniel Veillard | 8acca11 | 2002-01-21 09:52:27 +0000 | [diff] [blame] | 76 | <tr><td bgcolor="#fffacd"><ul> |
Daniel Veillard | 594cf0b | 2001-10-25 08:09:12 +0000 | [diff] [blame] | 77 | <li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li> |
| 78 | <li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li> |
Daniel Veillard | 4a85920 | 2002-01-08 11:49:22 +0000 | [diff] [blame] | 79 | <li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li> |
Daniel Veillard | 2d347fa | 2002-03-17 10:34:11 +0000 | [diff] [blame] | 80 | <li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li> |
Daniel Veillard | 594cf0b | 2001-10-25 08:09:12 +0000 | [diff] [blame] | 81 | <li><a href="ftp://xmlsoft.org/">FTP</a></li> |
| 82 | <li><a href="http://www.fh-frankfurt.de/~igor/projects/libxml/">Windows binaries</a></li> |
Daniel Veillard | db9dfd9 | 2001-11-26 17:25:02 +0000 | [diff] [blame] | 83 | <li><a href="http://garypennington.net/libxml2/">Solaris binaries</a></li> |
Daniel Veillard | e6d8e20 | 2002-05-02 06:11:10 +0000 | [diff] [blame] | 84 | <li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li> |
Daniel Veillard | 2d347fa | 2002-03-17 10:34:11 +0000 | [diff] [blame] | 85 | <li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml&product=libxml2">Bug Tracker</a></li> |
Daniel Veillard | 594cf0b | 2001-10-25 08:09:12 +0000 | [diff] [blame] | 86 | </ul></td></tr> |
| 87 | </table> |
| 88 | </td></tr></table></td> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 89 | <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"> |
| 90 | <p>Sometimes the DOM tree output is just too large to fit reasonably into |
| 91 | memory. In that case (and if you don't expect to save back the XML document |
| 92 | loaded using libxml), it's better to use the SAX interface of libxml. SAX is |
| 93 | a <strong>callback-based interface</strong> to the parser. Before parsing, |
| 94 | the application layer registers a customized set of callbacks which are |
| 95 | called by the library as it progresses through the XML input.</p> |
| 96 | <p>To get more detailed step-by-step guidance on using the SAX interface of |
| 97 | libxml, see the <a href="http://www.daa.com.au/~james/gnome/xml-sax/xml-sax.html">nice |
| 98 | documentation</a>.written by <a href="mailto:james@daa.com.au">James |
| 99 | Henstridge</a>.</p> |
| 100 | <p>You can debug the SAX behaviour by using the <strong>testSAX</strong> |
| 101 | program located in the gnome-xml module (it's usually not shipped in the |
| 102 | binary packages of libxml, but you can find it in the tar source |
| 103 | distribution). Here is the sequence of callbacks that would be reported by |
| 104 | testSAX when parsing the example XML document shown earlier:</p> |
| 105 | <pre>SAX.setDocumentLocator() |
| 106 | SAX.startDocument() |
| 107 | SAX.getEntity(amp) |
| 108 | SAX.startElement(EXAMPLE, prop1='gnome is great', prop2='&amp; linux too') |
| 109 | SAX.characters( , 3) |
| 110 | SAX.startElement(head) |
| 111 | SAX.characters( , 4) |
| 112 | SAX.startElement(title) |
| 113 | SAX.characters(Welcome to Gnome, 16) |
| 114 | SAX.endElement(title) |
| 115 | SAX.characters( , 3) |
| 116 | SAX.endElement(head) |
| 117 | SAX.characters( , 3) |
| 118 | SAX.startElement(chapter) |
| 119 | SAX.characters( , 4) |
| 120 | SAX.startElement(title) |
| 121 | SAX.characters(The Linux adventure, 19) |
| 122 | SAX.endElement(title) |
| 123 | SAX.characters( , 4) |
| 124 | SAX.startElement(p) |
| 125 | SAX.characters(bla bla bla ..., 15) |
| 126 | SAX.endElement(p) |
| 127 | SAX.characters( , 4) |
| 128 | SAX.startElement(image, href='linus.gif') |
| 129 | SAX.endElement(image) |
| 130 | SAX.characters( , 4) |
| 131 | SAX.startElement(p) |
| 132 | SAX.characters(..., 3) |
| 133 | SAX.endElement(p) |
| 134 | SAX.characters( , 3) |
| 135 | SAX.endElement(chapter) |
| 136 | SAX.characters( , 1) |
| 137 | SAX.endElement(EXAMPLE) |
| 138 | SAX.endDocument()</pre> |
| 139 | <p>Most of the other interfaces of libxml are based on the DOM tree-building |
| 140 | facility, so nearly everything up to the end of this document presupposes the |
| 141 | use of the standard DOM tree build. Note that the DOM tree itself is built by |
| 142 | a set of registered default callbacks, without internal specific |
| 143 | interface.</p> |
Daniel Veillard | 3f4c40f | 2002-02-13 09:19:28 +0000 | [diff] [blame] | 144 | <p><a href="bugs.html">Daniel Veillard</a></p> |
Daniel Veillard | c948420 | 2001-10-24 12:35:52 +0000 | [diff] [blame] | 145 | </td></tr></table></td></tr></table></td></tr></table></td> |
| 146 | </tr></table></td></tr></table> |
| 147 | </body> |
| 148 | </html> |