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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 specified 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 parameter.
       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. Additionally to the interface specified
           for DOM Level2, the method provides 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
       2.0008

COPYRIGHT
       2001-2007, AxKit.com Ltd.

       2002-2006, Christian Glahn.

       2006-2009, Petr Pajas.



perl v5.16.2                                     2012-10-22                               XML::LibXML::PI(3)