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.\" ========================================================================
.\"
.IX Title "Node 3pm"
.TH Node 3pm "2001-12-11" "perl v5.10.0" "User Contributed Perl Documentation"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.SH "NAME"
XML::Node \- Node\-based XML parsing: an simplified interface to XML::Parser
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& use XML::Node;
\&
\& $xml_node = new XML::Node;
\& $xml_node\->register( $nodetype, $callback_type => \e&callback_function );
\& $xml_node\->register( $nodetype, $callback_type => \e$variable );
\&
\& open(FOO, \*(Aqxmlgenerator |\*(Aq);
\& $p3\->parse(*FOO);
\& close(FOO);
\&
\& $xml_node\->parsefile( $xml_filename );
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
If you are only interested in processing certain nodes in an \s-1XML\s0 file, this
module can help you simplify your Perl scripts significantly.
.PP
The XML::Node module allows you to register callback functions or variables for
any \s-1XML\s0 node. If you register a call back function, it will be called when
the node of the type you specified are encountered. If you register a variable,
the content of a \s-1XML\s0 node will be appended to that variable automatically.
.PP
Subroutine register accepts both absolute and relative node registrations.
.PP
Here is an example of absolute path registration:
.PP
.Vb 1
\& 1. register(">TestCase>Name", "start" => \e&handle_TestCase_Name_start);
.Ve
.PP
Here are examples of single node name registration:
.PP
.Vb 3
\& 2. register( "Name", "start" => \e&handle_Name_start);
\& 3. register( "Name", "end" => \e&handle_Name_end);
\& 4. register( "Name", "char" => \e&handle_Name_char);
.Ve
.PP
Here is an example of attribute registration:
.PP
.Vb 1
\& 5. register(">TestCase:Author", "attr" => \e$testcase_author);
.Ve
.PP
Abosolute path trigger condition is recommended because a \*(L"Name\*(R" tage could appear in different
places and stands for differe names.
.PP
Example:
.PP
.Vb 6
\& 1
\& 2 Something
\& 3
\& 4 Something
\& 5
\& 6
.Ve
.PP
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.
.PP
This module uses XML::Parser.
.SH "EXAMPLE"
.IX Header "EXAMPLE"
Examples \*(L"test.pl\*(R" and \*(L"parse_orders.pl\*(R" come with this perl module.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
XML::Parser
.SH "NOTE"
.IX Header "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.
.SH "AUTHORS"
.IX Header "AUTHORS"
Chang Liu
.SH "LAST MODIFIED"
.IX Header "LAST MODIFIED"
\&\f(CW$Date:\fR 2001/12/10 11:38:28 $