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Manual Reference Pages  -  XML::NODE (3)

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NAME

XML::Node - Node-based XML parsing: an simplified interface to XML::Parser

CONTENTS

SYNOPSIS



 use XML::Node;

 $xml_node = new XML::Node;
 $xml_node->register( $nodetype, $callback_type => \&callback_function );
 $xml_node->register( $nodetype, $callback_type => \$variable );
   
 open(FOO, xmlgenerator |);
 $p3->parse(*FOO);
 close(FOO);

 $xml_node->parsefile( $xml_filename );



DESCRIPTION

If you are only interested in processing certain nodes in an XML file, this module can help you simplify your Perl scripts significantly.

The XML::Node module allows you to register callback functions or variables for any XML node. If you register a call back function, it will be called when the node of the type you specified are encountered. If you register a variable, the content of a XML node will be appended to that variable automatically.

Subroutine register accepts both absolute and relative node registrations.

Here is an example of absolute path registration:



 1. register(">TestCase>Name", "start" => \&handle_TestCase_Name_start);



Here are examples of single node name registration:



 2. register( "Name", "start" => \&handle_Name_start);
 3. register( "Name", "end"   => \&handle_Name_end);
 4. register( "Name", "char"  => \&handle_Name_char);



Here is an example of attribute registration:



 5. register(">TestCase:Author", "attr" => \$testcase_author);



Abosolute path trigger condition is recommended because a Name tage could appear in different places and stands for differe names.

Example:



  1  <Testcase>
  2     <Name>Something</Name>
  3     <Oracle>
  4         <Name>Something</Name>
  5     </Oracle>
  6  </Testcase>



Statement 1 causes &handle_TestCase_Name_start to be called when parsing Line 2. Statements 2,3,4 cause the three handler subroutines to be called when parsing both Line 2 and Line 4.

This module uses XML::Parser.

EXAMPLE

Examples test.pl and parse_orders.pl come with this perl module.

SEE ALSO

XML::Parser

NOTE

When you register a variable, XML::Node appends strings found to that variable. So please be sure to clear that variable before it is used again.

AUTHORS

Chang Liu <liu@ics.uci.edu>

LAST MODIFIED

$Date: 2001/12/10 11:38:28 $
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perl v5.20.3 NODE (3) 2001-12-11

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