****************************Code for the first add-in*******************************
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui"
	xmlns:nsDennis="Dennis Namespace">
  <ribbon startFromScratch="false">
    <tabs>
      <tab idQ="nsDennis:rxtabDennis" label="Dennis Tools" visible="1">
        <group id="rxgrpBasic" label="Basic Tools" visible="1">
           <button id="rxbtnImportData"
           label="Import data"
           screentip="Import Data."
           imageMso="DatabaseAccessBackEnd"
           size="large"
           tag="Import_Data"
           onAction="Shared_Basic_Tools_Click" />
           <button id="rxbtnDataReport"
           label="Data Report"
           screentip="Create a data report."
           imageMso="ImportExcel"
           size="large"
           tag="Data_Report"
           onAction="Shared_Basic_Tools_Click" />
           <button id="rxbtnChartReport"
           label="Chart Report"
           screentip="Create a chart report."
           imageMso="PivotChartType"
           size="large"
           tag="Chart_Report"
           onAction="Shared_Basic_Tools_Click" />     
        </group>
      </tab>
    </tabs>
  </ribbon>
</customUI>

****************************Code for the second add-in*******************************
<customUI xmlns="http://schemas.microsoft.com/office/2006/01/customui"
	xmlns:nsDennis="Dennis Namespace">
  <ribbon startFromScratch="false">
    <tabs>
      <tab idQ="nsDennis:rxtabDennis" label="Dennis Tools" visible="1">
        <group id="rxgrpDistribution" label="Distribution">
          <button id="rxbtnEmailTeam"
            label="E-mail Team"
            screentip="E-mail Team."
            imageMso="AttachItem"
            size="large"
            tag="Email_Team"
            onAction="Shared_Distribution_Click" />
          <button id="rxbtnEmailManager"
            label="E-mail Manager"
            screentip="E-mail Manager."
            imageMso="FileManageMenu"
            size="large"
            tag="Email_Manager"
            onAction="Shared_Distribution_Click" />
          <button id="rxbtnPublishMoss"
            label="Publish MOSS"
            screentip="Publish to MOSS."
            imageMso="ExportSharePointList"
            size="large"
            tag="Publish_MOSS"
            onAction="Shared_Distribution_Click" />
        </group>
      </tab>
    </tabs>
  </ribbon>
</customUI>