text: .
  The parser behavior can be changed by setting features.
  $parser->set_feature(FEATURE, VALUE);
  XML::SAX::ExpatXS provides these adjustable features:
  Consequent character data are joined (1, default) or not (0).
  Namespace attributes are reported as common attributes (1, default) or not (0).
  When set on, xmlns and xmlns:* attributes are put into namespaces in a Perl SAX traditional way; xmlns attributes are in no namespace while xmlns:* attributes are in the namespace. This feature is set to 1 by default.
  This feature applies if and only if the feature is off. Then, xmlns and xmlns:* attributes are both put into no namespace (0, default) or into namespace (1).
  The document locator is updated (1, default) for ContentHadler events or not (0).
  A recognized string (the text string currently processed by this XML parser) is either maintained as $parser->{ParseOptions}{RecognizedString} (1) or not (0, default).
  Controls whether this parser processes external general entities (1, default) or not (0).
  Controls whether this parser processes external parameter entities including an external DTD subset (1) or not (0, default). <pcimprich AT gmail DOT com> (maintainer) Matt Sergeant <matt AT sergeant DOT org>
  This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.