diff options
| author | MDT 2002 John Fleck <jfleck@inkstain.net> | 2002-06-13 03:30:26 +0000 |
|---|---|---|
| committer | John Fleck <jfleck@src.gnome.org> | 2002-06-13 03:30:26 +0000 |
| commit | 54520837add57527ec0c0ccc34d37cc1e3c51aa2 (patch) | |
| tree | 0d79ab4f7295943aba0c95586531f486ec0cfd8a /doc | |
| parent | f5582f156c82962e669f68c8cd6b8ea4d3277086 (diff) | |
| download | android_external_libxml2-54520837add57527ec0c0ccc34d37cc1e3c51aa2.tar.gz android_external_libxml2-54520837add57527ec0c0ccc34d37cc1e3c51aa2.tar.bz2 android_external_libxml2-54520837add57527ec0c0ccc34d37cc1e3c51aa2.zip | |
doc/tutorial/xmltutorial.xml doc/tutorial/ar01s07.html
Wed Jun 12 21:26:08 MDT 2002 John Fleck <jfleck@inkstain.net>
* doc/tutorial/xmltutorial.xml
* doc/tutorial/ar01s07.html
* doc/tutorial/ape.html
* doc/tutorial/includegetattribute.c
adding section to tutorial about retrieving an attribute
value
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/tutorial/apa.html | 4 | ||||
| -rw-r--r-- | doc/tutorial/apd.html | 4 | ||||
| -rw-r--r-- | doc/tutorial/ape.html | 73 | ||||
| -rw-r--r-- | doc/tutorial/ar01s06.html | 4 | ||||
| -rw-r--r-- | doc/tutorial/ar01s07.html | 35 | ||||
| -rw-r--r-- | doc/tutorial/includegetattribute.c | 69 | ||||
| -rw-r--r-- | doc/tutorial/index.html | 5 | ||||
| -rw-r--r-- | doc/tutorial/xmltutorial.xml | 72 |
8 files changed, 245 insertions, 21 deletions
diff --git a/doc/tutorial/apa.html b/doc/tutorial/apa.html index d01ea2ed..375fb695 100644 --- a/doc/tutorial/apa.html +++ b/doc/tutorial/apa.html @@ -1,5 +1,5 @@ <!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>A. Sample Document</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="ar01s06.html" title="Writing Attribute"><link rel="next" href="apb.html" title="B. Code for Keyword Example"></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">A. Sample Document</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s06.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="apb.html">Next</a></td></tr></table><hr></div><div class="appendix"><h2 class="title" style="clear: both"><a name="sampledoc"></a>A. Sample Document</h2><pre class="programlisting"> +<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"><title>A. Sample Document</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="ar01s07.html" title="Retrieving Attributes"><link rel="next" href="apb.html" title="B. Code for Keyword Example"></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">A. Sample Document</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s07.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="apb.html">Next</a></td></tr></table><hr></div><div class="appendix"><h2 class="title" style="clear: both"><a name="sampledoc"></a>A. Sample Document</h2><pre class="programlisting"> <?xml version="1.0"?> <story> <storyinfo> @@ -12,4 +12,4 @@ <para>This is the body text.</para> </body> </story> -</pre></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s06.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="apb.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing Attribute </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> B. Code for Keyword Example</td></tr></table></div></body></html> +</pre></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s07.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="apb.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Retrieving Attributes </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> B. Code for Keyword Example</td></tr></table></div></body></html> diff --git a/doc/tutorial/apd.html b/doc/tutorial/apd.html index 66cddfe3..5e56f3c5 100644 --- a/doc/tutorial/apd.html +++ b/doc/tutorial/apd.html @@ -1,5 +1,5 @@ <!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>D. Code for Add Attribute Example</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="apc.html" title="C. Code for Add Keyword Example"></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">D. Code for Add Attribute Example</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apc.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> </td></tr></table><hr></div><div class="appendix"><h2 class="title" style="clear: both"><a name="addattributeappendix"></a>D. Code for Add Attribute Example</h2><p> +<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"><title>D. Code for Add Attribute Example</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="apc.html" title="C. Code for Add Keyword Example"><link rel="next" href="ape.html" title="E. Code for Retrieving Attribute Value Example"></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">D. Code for Add Attribute Example</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apc.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ape.html">Next</a></td></tr></table><hr></div><div class="appendix"><h2 class="title" style="clear: both"><a name="addattributeappendix"></a>D. Code for Add Attribute Example</h2><p> <pre class="programlisting"> #include <stdio.h> #include <string.h> @@ -64,4 +64,4 @@ main(int argc, char **argv) { } </pre> - </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="apc.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> </td></tr><tr><td width="40%" align="left" valign="top">C. Code for Add Keyword Example </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> </td></tr></table></div></body></html> + </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="apc.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ape.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">C. Code for Add Keyword Example </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> E. Code for Retrieving Attribute Value Example</td></tr></table></div></body></html> diff --git a/doc/tutorial/ape.html b/doc/tutorial/ape.html new file mode 100644 index 00000000..9be15e85 --- /dev/null +++ b/doc/tutorial/ape.html @@ -0,0 +1,73 @@ +<!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>E. Code for Retrieving Attribute Value Example</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="apd.html" title="D. Code for Add Attribute Example"></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">E. Code for Retrieving Attribute Value Example</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="apd.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> </td></tr></table><hr></div><div class="appendix"><h2 class="title" style="clear: both"><a name="getattributeappendix"></a>E. Code for Retrieving Attribute Value Example</h2><p> + <pre class="programlisting"> +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <libxml/xmlmemory.h> +#include <libxml/parser.h> + +void +getReference (xmlDocPtr doc, xmlNodePtr cur) { + + cur = cur->xmlChildrenNode; + while (cur != NULL) { + if ((!xmlStrcmp(cur->name, (const xmlChar *)"reference"))) { + printf("uri: %s\n", xmlGetProp(cur, "uri")); + } + cur = cur->next; + } + return; +} + + +void +parseDoc(char *docname) { + + xmlDocPtr doc; + xmlNodePtr cur; + + doc = xmlParseFile(docname); + + if (doc == NULL ) { + fprintf(stderr,"Document not parsed successfully. \n"); + return; + } + + cur = xmlDocGetRootElement(doc); + + if (cur == NULL) { + fprintf(stderr,"empty document\n"); + xmlFreeDoc(doc); + return; + } + + if (xmlStrcmp(cur->name, (const xmlChar *) "story")) { + fprintf(stderr,"document of the wrong type, root node != story"); + xmlFreeDoc(doc); + return; + } + + getReference (doc, cur); + + return; +} + +int +main(int argc, char **argv) { + + char *docname; + + if (argc <= 1) { + printf("Usage: %s docname\n", argv[0]); + return(0); + } + + docname = argv[1]; + parseDoc (docname); + + return (1); +} + +</pre> + </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="apd.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> </td></tr><tr><td width="40%" align="left" valign="top">D. Code for Add Attribute Example </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> </td></tr></table></div></body></html> diff --git a/doc/tutorial/ar01s06.html b/doc/tutorial/ar01s06.html index 8d2afd15..2bbd2dfa 100644 --- a/doc/tutorial/ar01s06.html +++ b/doc/tutorial/ar01s06.html @@ -1,5 +1,5 @@ <!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 Attribute</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="ar01s05.html" title="Writing element content"><link rel="next" href="apa.html" title="A. Sample Document"></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 Attribute</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s05.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="apa.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="xmltutorialwritingattribute"></a>Writing Attribute</h2></div></div><p>Writing an attribute is similar to writing text to a new element. In +<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"><title>Writing Attribute</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="ar01s05.html" title="Writing element content"><link rel="next" href="ar01s07.html" title="Retrieving Attributes"></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 Attribute</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s05.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ar01s07.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="xmltutorialwritingattribute"></a>Writing Attribute</h2></div></div><p>Writing an attribute is similar to writing text to a new element. In this case, we'll add a reference URI to our document. Full code:<a href="apd.html" title="D. Code for Add Attribute Example">Appendix D</a>.</p><p> A <tt class="sgmltag-element">reference</tt> is a child of the <tt class="sgmltag-element">story</tt> @@ -27,4 +27,4 @@ <div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><a href="#addreferencenode"><img src="images/callouts/1.png" alt="1" border="0"></a> </td><td valign="top" align="left"><p>First we add a new node at the location of the current node pointer, <tt>cur.</tt> using the <a href="http://xmlsoft.org/html/libxml-tree.html#XMLNEWTEXTCHILD" target="_top">xmlNewTextChild</a> function.</p></td></tr></table></div> </p><p>Once the node is added, the file is written to disk just as in the - previous example in which we added an element with text content.</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s05.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="apa.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing element content </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> A. Sample Document</td></tr></table></div></body></html> + previous example in which we added an element with text content.</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s05.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ar01s07.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing element content </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> Retrieving Attributes</td></tr></table></div></body></html> diff --git a/doc/tutorial/ar01s07.html b/doc/tutorial/ar01s07.html new file mode 100644 index 00000000..7dda324c --- /dev/null +++ b/doc/tutorial/ar01s07.html @@ -0,0 +1,35 @@ +<!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>Retrieving Attributes</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="ar01s06.html" title="Writing Attribute"><link rel="next" href="apa.html" title="A. Sample Document"></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">Retrieving Attributes</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s06.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="apa.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="xmltutorialattribute"></a>Retrieving Attributes</h2></div></div><p>Retrieving the value of an attribute is similar to the previous + example in which we retrieved a node's text contents. In this case we'll + extract the value of the URI we added in the previous + section. Full code: <a href="ape.html" title="E. Code for Retrieving Attribute Value Example">Appendix E</a>.</p><p> + The initial steps for this example are similar to the previous ones: parse + the doc, find the element you are interested in, then enter a function to + carry out the specific task required. In this case, we call + <tt>getReference</tt>: + <pre class="programlisting"> +void +getReference (xmlDocPtr doc, xmlNodePtr cur) { + + cur = cur->xmlChildrenNode; + while (cur != NULL) { + if ((!xmlStrcmp(cur->name, (const xmlChar *)"reference"))) { + <a name="getattributevalue"></a><img src="images/callouts/1.png" alt="1" border="0"> printf("uri: %s\n", xmlGetProp(cur, "uri")); + } + cur = cur->next; + } + return; +} + </pre> + + <div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><a href="#getattributevalue"><img src="images/callouts/1.png" alt="1" border="0"></a> </td><td valign="top" align="left"><p> + The key function is <tt><a href="http://xmlsoft.org/html/libxml-tree.html#XMLGETPROP" target="_top">xmlGetProp</a></tt>, which returns an + <tt>xmlChar</tt> containing the attribute's value. In this case, + we just print it out. + <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p> + If you are using a DTD that declares a fixed or + default value for the attribute, this function will retrieve it. + </p></div> + </p></td></tr></table></div> + + </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s06.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="apa.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Writing Attribute </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> A. Sample Document</td></tr></table></div></body></html> diff --git a/doc/tutorial/includegetattribute.c b/doc/tutorial/includegetattribute.c new file mode 100644 index 00000000..f934667e --- /dev/null +++ b/doc/tutorial/includegetattribute.c @@ -0,0 +1,69 @@ +<![CDATA[ +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include <libxml/xmlmemory.h> +#include <libxml/parser.h> + +void +getReference (xmlDocPtr doc, xmlNodePtr cur) { + + cur = cur->xmlChildrenNode; + while (cur != NULL) { + if ((!xmlStrcmp(cur->name, (const xmlChar *)"reference"))) { + printf("uri: %s\n", xmlGetProp(cur, "uri")); + } + cur = cur->next; + } + return; +} + + +void +parseDoc(char *docname) { + + xmlDocPtr doc; + xmlNodePtr cur; + + doc = xmlParseFile(docname); + + if (doc == NULL ) { + fprintf(stderr,"Document not parsed successfully. \n"); + return; + } + + cur = xmlDocGetRootElement(doc); + + if (cur == NULL) { + fprintf(stderr,"empty document\n"); + xmlFreeDoc(doc); + return; + } + + if (xmlStrcmp(cur->name, (const xmlChar *) "story")) { + fprintf(stderr,"document of the wrong type, root node != story"); + xmlFreeDoc(doc); + return; + } + + getReference (doc, cur); + + return; +} + +int +main(int argc, char **argv) { + + char *docname; + + if (argc <= 1) { + printf("Usage: %s docname\n", argv[0]); + return(0); + } + + docname = argv[1]; + parseDoc (docname); + + return (1); +} +]]> diff --git a/doc/tutorial/index.html b/doc/tutorial/index.html index eef00e37..3dee1480 100644 --- a/doc/tutorial/index.html +++ b/doc/tutorial/index.html @@ -1,5 +1,5 @@ <!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>Libxml Tutorial</title><meta name="generator" content="DocBook XSL Stylesheets V1.48"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="next" href="ar01s02.html" title="Data Types"></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">Libxml Tutorial</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ar01s02.html">Next</a></td></tr></table><hr></div><div class="article"><div class="titlepage"><div><h1 class="title"><a name="id2759085"></a>Libxml Tutorial</h1></div><div><h3 class="author">John Fleck</h3></div><div><p class="copyright">Copyright © 2002 John Fleck</p></div><div><div class="revhistory"><table border="1" width="100%" summary="Revision history"><tr><th align="left" valign="top" colspan="2"><b>Revision History</b></th></tr><tr><td align="left">Revision 1</td><td align="left">June 4,2002</td></tr></table></div></div><hr></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><a href="index.html#introduction">Introduction</a></dt><dt><a href="ar01s02.html">Data Types</a></dt><dt><a href="ar01s03.html">Parsing the file</a></dt><dt><a href="ar01s04.html">Retrieving Element Content</a></dt><dt><a href="ar01s05.html">Writing element content</a></dt><dt><a href="ar01s06.html">Writing Attribute</a></dt><dt>A. <a href="apa.html">Sample Document</a></dt><dt>B. <a href="apb.html">Code for Keyword Example</a></dt><dt>C. <a href="apc.html">Code for Add Keyword Example</a></dt><dt>D. <a href="apd.html">Code for Add Attribute Example</a></dt></dl></div><div class="abstract"><p><b>Abstract</b></p><p>Libxml is a freely licensed C language library for handling +<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"><title>Libxml Tutorial</title><meta name="generator" content="DocBook XSL Stylesheets V1.48"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="next" href="ar01s02.html" title="Data Types"></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">Libxml Tutorial</th></tr><tr><td width="20%" align="left"> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ar01s02.html">Next</a></td></tr></table><hr></div><div class="article"><div class="titlepage"><div><h1 class="title"><a name="id2755382"></a>Libxml Tutorial</h1></div><div><h3 class="author">John Fleck</h3></div><div><p class="copyright">Copyright © 2002 John Fleck</p></div><div><div class="revhistory"><table border="1" width="100%" summary="Revision history"><tr><th align="left" valign="top" colspan="2"><b>Revision History</b></th></tr><tr><td align="left">Revision 1</td><td align="left">June 4,2002</td></tr><tr><td align="left">Revision 2</td><td align="left">June 12, 2002</td></tr></table></div></div><hr></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><a href="index.html#introduction">Introduction</a></dt><dt><a href="ar01s02.html">Data Types</a></dt><dt><a href="ar01s03.html">Parsing the file</a></dt><dt><a href="ar01s04.html">Retrieving Element Content</a></dt><dt><a href="ar01s05.html">Writing element content</a></dt><dt><a href="ar01s06.html">Writing Attribute</a></dt><dt><a href="ar01s07.html">Retrieving Attributes</a></dt><dt>A. <a href="apa.html">Sample Document</a></dt><dt>B. <a href="apb.html">Code for Keyword Example</a></dt><dt>C. <a href="apc.html">Code for Add Keyword Example</a></dt><dt>D. <a href="apd.html">Code for Add Attribute Example</a></dt><dt>E. <a href="ape.html">Code for Retrieving Attribute Value Example</a></dt></dl></div><div class="abstract"><p><b>Abstract</b></p><p>Libxml is a freely licensed C language library for handling XML, portable across a large number of platforms. This tutorial provides examples of its basic functions.</p></div><div class="sect1"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="introduction"></a>Introduction</h2></div></div><p>Libxml is a C language library implementing functions for reading, creating and manipulating XML data. This tutorial @@ -11,6 +11,5 @@ </p><p>The tutorial is based on a simple XML application I use for articles I write. The format includes metadata and the body of the article.</p><p>The example code in this tutorial demonstrates how to: - <div class="itemizedlist"><ul type="disc"><li><p>Parse the document.</p></li><li><p>Extract the text within a specified element.</p></li><li><p>Add an element and its content.</p></li><li><p>Extract the value of an attribute.</p></li><li><p>Add an attribute.</p></li></ul></div> - + <div class="itemizedlist"><ul type="disc"><li><p>Parse the document.</p></li><li><p>Extract the text within a specified element.</p></li><li><p>Add an element and its content.</p></li><li><p>Add an attribute.</p></li><li><p>Extract the value of an attribute.</p></li></ul></div> </p><p>Full code for the examples is included in the appendices.</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="ar01s02.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"> </td><td width="20%" align="center"> </td><td width="40%" align="right" valign="top"> Data Types</td></tr></table></div></body></html> diff --git a/doc/tutorial/xmltutorial.xml b/doc/tutorial/xmltutorial.xml index be9a1ba3..e73ec3a4 100644 --- a/doc/tutorial/xmltutorial.xml +++ b/doc/tutorial/xmltutorial.xml @@ -5,6 +5,7 @@ <!ENTITY STORY SYSTEM "includestory.xml"> <!ENTITY ADDKEYWORD SYSTEM "includeaddkeyword.c"> <!ENTITY ADDATTRIBUTE SYSTEM "includeaddattribute.c"> +<!ENTITY GETATTRIBUTE SYSTEM "includegetattribute.c"> ]> <article> <articleinfo> @@ -22,6 +23,10 @@ <revnumber>1</revnumber> <date>June 4,2002</date> </revision> + <revision> + <revnumber>2</revnumber> + <date>June 12, 2002</date> + </revision> </revhistory> </articleinfo> <abstract> @@ -59,13 +64,12 @@ <para>Add an element and its content.</para> </listitem> <listitem> - <para>Extract the value of an attribute.</para> - </listitem> - <listitem> <para>Add an attribute.</para> + </listitem> + <listitem> + <para>Extract the value of an attribute.</para> </listitem> </itemizedlist> - </para> <para>Full code for the examples is included in the appendices.</para> @@ -288,15 +292,7 @@ parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) { the old file. The second parameter is a pointer to the xmlDoc structure. Setting the third parameter equal to one ensures indenting on output. </para> - </sect1> -<!-- - <sect1 id="xmltutorialattribute"> - <title>Retrieving Attributes</title> - <para>Retrieving</para> - </sect1> ---> - <sect1 id="xmltutorialwritingattribute"> <title>Writing Attribute</title> @@ -341,6 +337,52 @@ parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) { </sect1> + <sect1 id="xmltutorialattribute"> + <title>Retrieving Attributes</title> + <para>Retrieving the value of an attribute is similar to the previous + example in which we retrieved a node's text contents. In this case we'll + extract the value of the <acronym>URI</acronym> we added in the previous + section. Full code: <xref linkend="getattributeappendix" />.</para> + <para> + The initial steps for this example are similar to the previous ones: parse + the doc, find the element you are interested in, then enter a function to + carry out the specific task required. In this case, we call + <function>getReference</function>: + <programlisting> +void +getReference (xmlDocPtr doc, xmlNodePtr cur) { + + cur = cur->xmlChildrenNode; + while (cur != NULL) { + if ((!xmlStrcmp(cur->name, (const xmlChar *)"reference"))) { + <co id="getattributevalue" /> printf("uri: %s\n", xmlGetProp(cur, "uri")); + } + cur = cur->next; + } + return; +} + </programlisting> + + <calloutlist> + <callout arearefs="getattributevalue"> + <para> + The key function is <function><ulink + url="http://xmlsoft.org/html/libxml-tree.html#XMLGETPROP">xmlGetProp</ulink></function>, which returns an + <varname>xmlChar</varname> containing the attribute's value. In this case, + we just print it out. + <note> + <para> + If you are using a <acronym>DTD</acronym> that declares a fixed or + default value for the attribute, this function will retrieve it. + </para> + </note> + </para> + </callout> + </calloutlist> + + </para> + </sect1> + <!-- <appendix id="furtherresources"> <title>Further Resources</title> @@ -369,4 +411,10 @@ parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) { <programlisting>&ADDATTRIBUTE;</programlisting> </para> </appendix> +<appendix id="getattributeappendix"> + <title>Code for Retrieving Attribute Value Example</title> + <para> + <programlisting>&GETATTRIBUTE;</programlisting> + </para> + </appendix> </article> |