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XML::LibXML::PI - XML::LibXML Processing Instructions
$pinode->setData( $data_string ); $pinode->setData( name=>string_value [...] );
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() differs a bit from the the
standard version as available in XML::LibXML::Node():
$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.
Matt Sergeant, Christian Glahn, Petr Pajas,
1.63
2001-2007, AxKit.com Ltd; 2002-2006 Christian Glahn; 2006-2007 Petr Pajas, All rights reserved.