Tree Processing

• XML::LibXML, XML::XPath, XML::DOM, XML::EasyObj, XML::Twig

• Load the XML into a tree

• Navigation

  • my $child= $node->getFirstChild; # DANGEROUS
  • my $child= $elt->first_child( 'InvoiceDetails')

• Queries

  • my @rows= $node->getElementsByTagName( 'InvoiceRow');
  • $doc->findnodes( '/Finvoice/InvoiceRow');
  • $doc->findvalue( 'BuyerPartyIdentifier')
  • $doc->findvalue( '/Finvoice/BuyerDetails/BuyerId')
  • -