org.restlet.data
Classes 
ChallengeRequest
ChallengeResponse
ChallengeScheme
CharacterSet
ClientInfo
Conditions
Cookie
CookieSetting
Digest
Encoding
Form
Language
LocalReference
MediaType
Message
Metadata
Method
Parameter
Preference
Product
Protocol
Range
Reference
ReferenceList
Request
Response
ServerInfo
Status
Tag
Enums 
Dimension