State Token Syntax
State Tokens are URIs employing the following syntax:
State-Token = StateToken: Type : Resources : State-Info
Type = Type = Caret-encoded-URL
Resources = Res = Caret-encoded-URL
Caret-encoded-URL = ^ Resource ^
Resource = <A URI where all ^ characters are escaped>
State-Info = *(uchar | reserved) ; uchar, reserved defined in section 3.2.1 of RFC 2068