module REXML
module REXML::DClonable
module REXML::DTD
module REXML::Encoding
module REXML::EntityConst
module REXML::Formatters
module REXML::Functions
module REXML::Light
module REXML::Namespace
module REXML::Node
module REXML::Parsers
module REXML::Parsers::BaseParser::Private
module REXML::Parsers::EnumerableTally
module REXML::Parsers::StringScannerCaptures
module REXML::SAX2Listener
module REXML::Security
module REXML::Source::Private
module REXML::StreamListener
module REXML::StringScannerCheckScanString
module REXML::Validation
module REXML::Validation::Validator
module REXML::XMLTokens
class REXML::AttlistDecl
class REXML::Attribute
class REXML::Attributes
class REXML::CData
class REXML::Child
class REXML::Comment
class REXML::DTD::AttlistDecl
class REXML::DTD::ElementDecl
class REXML::DTD::EntityDecl
class REXML::DTD::NotationDecl
class REXML::DTD::Parser
class REXML::Declaration
class REXML::DocType
class REXML::Document
class REXML::Element
class REXML::ElementDecl
class REXML::Elements
class REXML::Entity
class REXML::ExternalEntity
class REXML::Formatters::Default
class REXML::Formatters::Pretty
class REXML::Formatters::Transitive
class REXML::IOSource
class REXML::Instruction
class REXML::Light::Node
class REXML::NotationDecl
class REXML::Output
class REXML::Parent
class REXML::ParseException
class REXML::Parsers::BaseParser
class REXML::Parsers::LightParser
class REXML::Parsers::PullEvent
class REXML::Parsers::PullParser
class REXML::Parsers::SAX2Parser
class REXML::Parsers::StreamParser
class REXML::Parsers::TreeParser
class REXML::Parsers::UltraLightParser
class REXML::Parsers::XPathParser
class REXML::QuickPath
class REXML::ReferenceWriter
class REXML::Source
class REXML::SourceFactory
class REXML::Text
class REXML::UndefinedNamespaceException
class REXML::Validation::Choice
class REXML::Validation::Event
class REXML::Validation::Interleave
class REXML::Validation::OneOrMore
class REXML::Validation::Optional
class REXML::Validation::Ref
class REXML::Validation::RelaxNG
class REXML::Validation::Sequence
class REXML::Validation::State
class REXML::Validation::ValidationException
class REXML::Validation::ZeroOrMore
class REXML::XMLDecl
class REXML::XPath
class REXML::XPathNode
class REXML::XPathParser
rexml
3.4.1
# error?
def error? @contents[0] == :error end