def self.new(node : LibXML::DocPtr)
def processing_instruction?
def xpath(path, namespaces = nil, variables = nil)
def xpath_bool(path, namespaces = nil, variables = nil)
def xpath_float(path, namespaces = nil, variables = nil)
def xpath_node(path, namespaces = nil, variables = nil)
def xpath_nodes(path, namespaces = nil, variables = nil)
def xpath_string(path, namespaces = nil, variables = nil)