Constants
      | DEFAULT_WRITER | = | XMLWriter::Simple # or XMLWriter::XMLParser | 
| DEFAULT_PARSER | = | XMLParser::REXMLStreamParser | 
| available parser:  | ||
| ENABLE_NIL_CREATE | = | false | 
| enable <nil/> tag | ||
| ENABLE_NIL_PARSER | = | false | 
| ENABLE_BIGINT | = | false | 
| allows integers greater than 32-bit if true | ||
| ENABLE_MARSHALLING | = | true | 
| enable marshalling ruby objects which include XMLRPC::Marshallable | ||
| ENABLE_MULTICALL | = | false | 
| enable multiCall extension by default | ||
| ENABLE_INTROSPECTION | = | false | 
| enable Introspection extension by default | ||