This occurs in "The immediate Attribute" section of the page entitled "Adding Components to a Page Using HTML Tags" at http://docs.oracle.com/javaee/6/tutorial/doc/bnarf.html. The section mentions the "force events, validations, and conversions to be processed when request parameter values are applied." However, the page request lifecycle that tells the ordinary sequencing of these activities has not yet been covered in the tutorial. At a minimum, it'd be good to link elsewhere in the tutorial where such things are covered, so you have the appropriate context to understand that section. Ideally, the tutorial would be sequenced with this section coming sometime after the section covering that request lifecycle.