Creating View-Switching Applications with Prism 4

<ribbon:RibbonTab x:Class="Prism4Demo.ModuleA.Views.ModuleARibbonTab"
                  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
                  xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
                  xmlns:ribbon="clr-namespace:Microsoft.Windows.Controls.Ribbon;assembly=RibbonControlsLibrary"
                  mc:Ignorable="d" 
                 Header="Module A">

    <!-- See code-behind for implementation of IRegionMemberLifetime interface. This interface
    causes the RibbonTab to be unloaded from the Ribbon when we switch views. -->

    <ribbon:RibbonGroup Header="Group A1">
        <ribbon:RibbonButton LargeImageSource="Images\LargeIcon.png" Label="Button A1" />
        <ribbon:RibbonButton SmallImageSource="Images\SmallIcon.png" Label="Button A2" />
        <ribbon:RibbonButton SmallImageSource="Images\SmallIcon.png" Label="Button A3" />
        <ribbon:RibbonButton SmallImageSource="Images\SmallIcon.png" Label="Button A4" />
    </ribbon:RibbonGroup>

</ribbon:RibbonTab >