This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
What do you mean, where does it come in the hierarchy? Its place in the hierarchy is shown explicitly in the Javadocs, which are available by clicking on the linkified ServletContext in any of these posts. It *has* no hierarchy, it simply is.