3.1.1 Abstract Data Model
A server supporting the WSTEP protocol maintains a relationship to an issuer which processes messages submitted by the server. When communicating with requestors, a server can support a variety of languages.
Issuer: An address of a certificate authority (CA). The format of the stored address is specific to the implementation and to the form of communication used between the Issuer and the Server.
SupportedLanguages: A list of language identifiers supported by the server. The set of languages are of type xml:lang and defined in [RFC3066].
DefaultLanguage: The default language for the server. DefaultLanguage is of type xml:lang, and the set of supported languages is defined in [RFC3066].