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1. SEAM nagivation based on function with parameters    stackoverflow.com

How do you setup a navigation rule based on a function with parameters in SEAM ? For example 

<page view-id="/firstPage.xhtml" back="enabled">
    <navigation from-action="#{actionBean.fetchItem(int index)}">
       ...

2. jsf navigation help    seamframework.org

I know this is more of a JSF question rather than a Seam 3 question but everybody here is so helpful and knowledgeable on JSF I figured I would ask it here...In Seam 2 I believe there was a way to intercept page navigation in such a way that you could always go to the login page if, say, identity.isLoggedIn() was ...