Using RichFaces with JSF 2

Facelets, despite its name, is not a smaller version of JSF; instead, at its core Facelets provides an alternative to JavaServer Pages (JSP) as a JSF ViewHandler. Facelets supports all of the JSF UI components and builds its own component tree, reflecting the view for a JSF application. The JSF 2 specification deprecates JSP as a view-definition language (VDL) and includes a standard version of Facelets as the preferred VDL. For that reason, RichFaces dropped JSP support and requires Facelets.