95 lines
2.2 KiB
Plaintext
95 lines
2.2 KiB
Plaintext
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=head1 NAME
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XML::LibXML::PI - XML::LibXML Processing Instructions
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=head1 SYNOPSIS
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use XML::LibXML;
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# Only methods specific to Processing Instruction nodes are listed here,
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# see the XML::LibXML::Node manpage for other methods
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$pinode->setData( $data_string );
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$pinode->setData( name=>string_value [...] );
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=head1 DESCRIPTION
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Processing instructions are implemented with XML::LibXML with read and write
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access. The PI data is the PI without the PI target (as specified in XML 1.0
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[17]) as a string. This string can be accessed with getData as implemented in L<<<<<< XML::LibXML::Node >>>>>>.
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The write access is aware about the fact, that many processing instructions
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have attribute like data. Therefore setData() provides besides the DOM spec
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conform Interface to pass a set of named parameter. So the code segment
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my $pi = $dom->createProcessingInstruction("abc");
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$pi->setData(foo=>'bar', foobar=>'foobar');
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$dom->appendChild( $pi );
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will result the following PI in the DOM:
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<?abc foo="bar" foobar="foobar"?>
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Which is how it is specified in the DOM specification. This three step
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interface creates temporary a node in perl space. This can be avoided while
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using the insertProcessingInstruction() method. Instead of the three calls
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described above, the call
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$dom->insertProcessingInstruction("abc",'foo="bar" foobar="foobar"');
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will have the same result as above.
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L<<<<<< XML::LibXML::PI >>>>>>'s implementation of setData() documented below differs a bit from the standard
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version as available in L<<<<<< XML::LibXML::Node >>>>>>:
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=over 4
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=item setData
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$pinode->setData( $data_string );
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$pinode->setData( name=>string_value [...] );
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This method allows one to change the content data of a PI. Additionally to the
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interface specified for DOM Level2, the method provides a named parameter
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interface to set the data. This parameter list is converted into a string
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before it is appended to the PI.
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=back
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=head1 AUTHORS
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Matt Sergeant,
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Christian Glahn,
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Petr Pajas
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=head1 VERSION
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2.0207
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=head1 COPYRIGHT
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2001-2007, AxKit.com Ltd.
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2002-2006, Christian Glahn.
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2006-2009, Petr Pajas.
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=cut
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=head1 LICENSE
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This program is free software; you can redistribute it and/or modify it under
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the same terms as Perl itself.
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