XML::LibXML::PI

XML::LibXML::PI(3)   User Contributed Perl Documentation   XML::LibXML::PI(3)



NAME
       XML::LibXML::PI - XML::LibXML Processing Instructions

SYNOPSIS
	 use XML::LibXML;
	 # Only methods specific to Processing Instruction nodes are listed here,
	 # see XML::LibXML::Node manpage for other methods

	 $pinode->setData( $data_string );
	 $pinode->setData( name=>string_value [...] );

DESCRIPTION
       Processing instructions are implemented with XML::LibXML with read and
       write access. The PI data is the PI without the PI target (as speci-
       fied in XML 1.0 [17]) as a string. This string can be accessed with
       getData as implemented in XML::LibXML::Node.

       The write access is aware about the fact, that many processing
       instructions have attribute like data. Therefore setData() provides
       besides the DOM spec conform Interface to pass a set of named parame-
       ter. So the code segment

	 my $pi = $dom->createProcessingInstruction("abc");
	 $pi->setData(foo=>’bar’, foobar=>’foobar’);
	 $dom->appendChild( $pi );

       will result the following PI in the DOM:

	 <?abc foo="bar" foobar="foobar"?>

       Which is how it is specified in the DOM specification. This three step
       interface creates temporary a node in perl space. This can be avoided
       while using the insertProcessingInstruction() method. Instead of the
       three calls described above, the call

	 $dom->insertProcessingInstruction("abc",’foo="bar" foobar="foobar"’);

       will have the same result as above.

       XML::LibXML::PI’s implementation of setData() documented below differs
       a bit from the the standard version as available in XML::LibXML::Node:

       setData
	     $pinode->setData( $data_string );
	     $pinode->setData( name=>string_value [...] );

	   This method allows to change the content data of a PI. Addition-
	   ally to the interface specified for DOM Level2, the method pro-
	   vides a named parameter interface to set the data. This parameter
	   list is converted into a string before it is appended to the PI.

AUTHORS
       Matt Sergeant, Christian Glahn, Petr Pajas

VERSION
       1.66

COPYRIGHT
       2001-2007, AxKit.com Ltd; 2002-2006 Christian Glahn; 2006-2008 Petr
       Pajas, All rights reserved.



perl v5.8.8			  2008-11-11		   XML::LibXML::PI(3)