locale

none 

Specifies the locale name. 

agent

none 

(optional) Specifies the type of client that interacts with the application server. For a given locale, different agents can have different preferred character encodings. The value of this attribute must exactly match the value of the user-agent HTTP request header sent by the client. See Table A–60 for more information.

charset

none 

Specifies the character encoding to which the locale maps.