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apa.html apb.html apc.html apd.html ar01s02.html ar01s03.html ar01s04.html

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Tue Jun  4 09:09:18 MDT 2002 John Fleck <jfleck@inkstain.net>

	* added doc/tutorial, including:
	apa.html
	apb.html
	apc.html
	apd.html
	ar01s02.html
	ar01s03.html
	ar01s04.html
	ar01s05.html
	ar01s06.html
	includeaddattribute.c
	includeaddkeyword.c
	includekeyword.c
	includestory.xml
	index.html
	xmltutorial.xml
	libxml tutorial, including generated html
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MDT 2002 John Fleck
2002-06-04 15:10:36 +00:00
committed by John Fleck
parent 6f4e5e7697
commit 598f6ebb94
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"><title>Writing element content</title><meta name="generator" content="DocBook XSL Stylesheets V1.48"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="up" href="index.html" title="Libxml Tutorial"><link rel="previous" href="ar01s04.html" title="Retrieving Element Content"><link rel="next" href="ar01s06.html" title="Writing Attribute"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Writing element content</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s04.html">Prev</a><EFBFBD></td><th width="60%" align="center"><EFBFBD></th><td width="20%" align="right"><EFBFBD><a accesskey="n" href="ar01s06.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="xmltutorialwritingcontent"></a>Writing element content</h2></div></div><p>Writing element content uses many of the same steps we used above
&#8212; parsing the document and walking the tree. We parse the document,
then traverse the tree to find the place we want to insert our element. For
this example, we want to again find the &quot;storyinfo&quot; element and
this time insert a keyword. Then we'll write the file to disk. Full code:
<a href="apc.html" title="C. Code for Add Keyword Example">Appendix C</a></p><p>
The main difference in this example is in
<tt>parseStory</tt>:
<pre class="programlisting">
void
parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) {
<a name="addkeyword"></a><img src="images/callouts/1.png" alt="1" border="0"> xmlNewTextChild (cur, NULL, &quot;keyword&quot;, keyword);
return;
}
</pre>
<div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><a href="#addkeyword"><img src="images/callouts/1.png" alt="1" border="0"></a> </td><td valign="top" align="left"><p>The <tt><a href="http://xmlsoft.org/html/libxml-tree.html#XMLNEWTEXTCHILD" target="_top">xmlNewTextChild</a></tt>
function adds a new child element at the
current node pointer's location in the
tree, specificied by <tt>cur</tt>.</p></td></tr></table></div>
</p><p>
Once the node has been added, we would like to write the document to
file. Is you want the element to have a namespace, you can add it here as
well. In our case, the namespace is NULL.
<pre class="programlisting">
xmlSaveFormatFile (docname, doc, 1);
</pre>
The first parameter is the name of the file to be written. You'll notice
it is the same as the file we just read. In this case, we just write over
the old file. The second parameter is a pointer to the xmlDoc
structure. Setting the third parameter equal to one ensures indenting on output.
</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s04.html">Prev</a><EFBFBD></td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"><EFBFBD><a accesskey="n" href="ar01s06.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Retrieving Element Content<6E></td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"><EFBFBD>Writing Attribute</td></tr></table></div></body></html>