Currently Seam has no validation for page parameters, but I agree that it would be a very-nice-to-have, and easy to implement. So my question really is: exactly what should actually *happen* when page parameter validation fails?? It's not like we can redisplay the form with error messages ;-) Options: * set validation.succeeded to false (allowing you to skip the page action) and add the validation messages to the page? * add the validation messages to the page and then redirect to some view-id defined in pages.xml? * throw an exception that you can handle in pages.xml? I can see good arguments for each one... Please create an issue in JIRA for this, and let's kick off discussion in this thread - I really don't know what is the best option.... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4049111#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...