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CentOS 7.0 - man page for xml::sax::documentlocator (centos section 3)

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SAX::DocumentLocator(3)        User Contributed Perl Documentation	  SAX::DocumentLocator(3)

       XML::SAX::DocumentLocator - Helper class for document locators

	 my $locator = XML::SAX::DocumentLocator->new(
	     sub { $object->get_public_id },
	     sub { $object->get_system_id },
	     sub { $reader->current_line },
	     sub { $reader->current_column },
	     sub { $reader->get_encoding },
	     sub { $reader->get_xml_version },

       This module gives you a tied hash reference that calls the specified closures when asked
       for PublicId, SystemId, LineNumber and ColumnNumber.

       It is useful for writing SAX Parsers so that you don't have to constantly update the line
       numbers in a hash reference on the object you pass to set_document_locator(). See the
       source code for XML::SAX::PurePerl for a usage example.

       There is only 1 method: "new". Simply pass it a list of closures that when called will
       return the PublicId, the SystemId, the LineNumber, the ColumnNumber, the Encoding and the
       XMLVersion respectively.

       The closures are passed a single parameter, the key being requested. But you're free to
       ignore that.

perl v5.16.3				    2009-10-10			  SAX::DocumentLocator(3)
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