8.1. WebSphere support for Servlet API V2.2

From the coder’s perspective the Servlet API V2.2 may seem to be a relatively minor extension of the API offered by WebSphere V3.5. (In contrast the JavaServer Pages API V1.1 also enabled by WebSphere V3.5.2 has very significant new functionality.) The V2.2 API does have some useful additional functionality and overall the V2.2 specification is more complete than the V2.1 specification, and V2.2 provides many important clarifications of behavior.

WebSphere V3.5.2 allows you to configure servlet engines to operate in either of two modes: WebSphere V3.5 Compatibility Mode and Servlet 2.2/JSP 1.1 Full Compliance Mode. For brevity we will refer to these modes as Compliance Mode and Compatibility Mode

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