sci perl weaver@gentoo.org Andrey Kislyuk XML-XPathEngine XML::XPathEngine XML::XPathEngine::Boolean XML::XPathEngine::Expr XML::XPathEngine::Function XML::XPathEngine::Literal XML::XPathEngine::LocationPath XML::XPathEngine::NodeSet XML::XPathEngine::Number XML::XPathEngine::Root XML::XPathEngine::Step XML::XPathEngine::Variable