code></a>,
 <a href="../../../jakarta/inject/Singleton.html" title="annotation in jakarta.inject"><code>&#064;Singleton</code></a>.</p>
 
 <p>The container provides an implementation of the <code>Context</code>
 interface for each of the built-in scopes. The built-in request, 
 session, and application contexts support servlet, web service 
 and EJB invocations. The built-in conversation context supports
 JSF requests.</p>
 
 <p>For other kinds of invocations, a portable extension may define a 
 custom <a h