The doc ( http://tapestry.apache.org/tapestry5/tapestry-core/guide/pagenav.html) says:
"At some point, persistent values make more sense. In the near future, there will be a client-side persistence strategy that will encode persistent data, such as the product id field, into query parameters (and hidden form fields) automatically." The relase of T5.0.5 says: "Release 5.0.5 improves the power and flexibility of the BeanEditForm and Grid component, adds a new HTML tutorial, adds client-side field persistence, fixes some problems with the quickstart Maven archetype, and allows expansions inside attributes (rather than just inside body text), as well as many other fixes." It seems the documentation needs to be updated. Cheers, Borut