3.2.3 Initialization

 The initialization requirements for client startup are implementation-dependent.<9>

There is one per-request initialization requirement for every client message. All requests to a state server require information that uniquely identifies session state information. The unique identifier is a combination of application identifier, application domain identifier, and session identifier. The specific values that are used for these fields are implementation-dependent.<10> However, client implementations MUST ensure that the combined values for these fields are unique. In other words, at least one of the three identifiers has to be unique to ensure that a state server can differentiate between different pieces of session state information.