The standard Unified Expression Language (EL) assumes that any parameters to a method expression will be provided by Java code. This means that a method with parameters cannot be used as a JSF method binding. Seam provides an enhancement to the EL that allows parameters to be included in a method expression itself. This applies to any Seam method expression, including any JSF method binding, for example:

<s:commandButton action="#{hotelBooking.bookHotel(hotel)}" value="Book Hotel"/>

<faces-config>
    <application>
        <view-handler>org.jboss.seam.ui.facelet.SeamFaceletViewHandler</view-handler>
    </application>
</faces-config>