Index: trunk/doc/manual/en_US/dita/topics/Introduction.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/Introduction.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/Introduction.dita	(revision 99182)
@@ -34,5 +34,12 @@
     <fig id="fig-win2016-intro">
       <title>Windows Server 2016 Virtual Machine, Displayed on a macOS Host</title>
-      <image href="images/vm-vista-running.png" width="12cm" placement="break"/>
+      <xref href="images/vm-vista-running.png" format="png" platform="htmlhelp">
+        <image href="images/vm-vista-running.png" width="14cm" placement="break">
+          <alt>Windows Server 2016 Virtual Machine, Displayed on a macOS Host</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/vm-vista-running.png" width="14cm" placement="break">
+        <alt>Windows Server 2016 Virtual Machine, Displayed on a macOS Host</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/clone.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/clone.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/clone.dita	(revision 99182)
@@ -47,5 +47,12 @@
     <fig id="fig-clone-wizard-name-path">
       <title>Clone Virtual Machine Wizard: New Machine Name and Path</title>
-      <image href="images/clone-vm-1.png" width="10cm" placement="break"/>
+      <xref href="images/clone-vm-1.png" format="png" platform="htmlhelp">
+        <image href="images/clone-vm-1.png" width="10cm" placement="break">
+          <alt>Clone Virtual Machine Wizard: New Machine Name and Path</alt>
+        </image>
+      </xref>
+        <image href="images/clone-vm-1.png" width="10cm" placement="break" platform="ohc">
+          <alt>Clone Virtual Machine Wizard: New Machine Name and Path</alt>
+        </image>
     </fig>
     <p>
@@ -95,7 +102,14 @@
       <b outputclass="bold">Clone Type</b> page is displayed.
     </p>
-    <fig id="fig-clone-wizard-clone-type">
+    <fig id="fig-clone-type">
       <title>Clone Virtual Machine Wizard: Clone Type</title>
-      <image href="images/clone-vm-2.png" width="10cm" placement="break"/>
+      <xref href="images/clone-vm-2.png" format="png" platform="htmlhelp">
+        <image href="images/clone-vm-2.png" width="10cm" placement="break">
+          <alt>Clone Virtual Machine Wizard: Clone Type</alt>
+        </image>
+      </xref>
+      <image href="images/clone-vm-2.png" width="10cm" placement="break" platform="ohc">
+        <alt>Clone Virtual Machine Wizard: Clone Type</alt>
+      </image>
     </fig>
     <p>
@@ -132,5 +146,12 @@
     <fig id="fig-clone-wizard-snapshots">
       <title>Clone Virtual Machine Wizard: Snapshots</title>
-      <image href="images/clone-vm-3.png" width="10cm" placement="break"/>
+      <xref href="images/clone-vm-3.png" format="png" platform="htmlhelp">
+        <image href="images/clone-vm-3.png" width="10cm" placement="break">
+          <alt>Clone Virtual Machine Wizard: Snapshots</alt>
+        </image>
+      </xref>
+      <image href="images/clone-vm-3.png" width="10cm" placement="break" platform="ohc">
+        <alt>Clone Virtual Machine Wizard: Snapshots</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/cloud-export-oci.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-export-oci.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-export-oci.dita	(revision 99182)
@@ -45,5 +45,12 @@
         <fig id="fig-export-appliance-oci">
           <title>Export Virtual Appliance Wizard: Format Settings</title>
-          <image href="images/export-appliance-oci.png" width="12cm" placement="break"/>
+          <xref href="images/export-appliance-oci.png" format="png" platform="htmlhelp">
+            <image href="images/export-appliance-oci.png" width="12cm" placement="break">
+              <alt>Export Virtual Appliance Wizard: Format Settings</alt>
+            </image>
+          </xref>
+          <image href="images/export-appliance-oci.png" width="12cm" placement="break" platform="ohc">
+            <alt>Export Virtual Appliance Wizard: Format Settings</alt>
+          </image>
         </fig>
         <p>
Index: trunk/doc/manual/en_US/dita/topics/cloud-import-oci.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-import-oci.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-import-oci.dita	(revision 99182)
@@ -44,5 +44,12 @@
         <fig id="fig-import-instance-oci">
           <title>Import Cloud Instance Wizard: Appliance Settings</title>
-          <image href="images/import-instance.png" width="12cm" placement="break"/>
+          <xref href="images/import-instance.png" format="png" platform="htmlhelp">
+            <image href="images/import-instance.png" width="12cm" placement="break">
+              <alt>Import Cloud Instance Wizard: Appliance Settings</alt>
+            </image>
+          </xref>
+          <image href="images/import-instance.png" width="12cm" placement="break" platform="ohc">
+            <alt>Import Cloud Instance Wizard: Appliance Settings</alt>
+          </image>
         </fig>
         <p>
Index: trunk/doc/manual/en_US/dita/topics/cloud-upload-public-key.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-upload-public-key.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-upload-public-key.dita	(revision 99182)
@@ -46,5 +46,12 @@
         <fig id="fig-upload-key-oci">
           <title>Upload Public Key Dialog in Oracle Cloud Infrastructure Console</title>
-          <image href="images/upload-key.png" width="12cm" placement="break"/>
+          <xref href="images/upload-key.png" format="png" platform="htmlhelp">
+            <image href="images/upload-key.png" width="12cm" placement="break">
+              <alt>Upload Public Key Dialog in Oracle Cloud Infrastructure Console</alt>
+            </image>
+          </xref>
+          <image href="images/upload-key.png" width="12cm" placement="break" platform="ohc">
+            <alt>Upload Public Key Dialog in Oracle Cloud Infrastructure Console</alt>
+          </image>
         </fig>
         <p>
Index: trunk/doc/manual/en_US/dita/topics/cloud-using-cloud-profile-manager.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-using-cloud-profile-manager.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-using-cloud-profile-manager.dita	(revision 99182)
@@ -17,5 +17,12 @@
     <fig id="fig-cloud-profile-manager">
       <title>The Cloud Profile Manager</title>
-      <image href="images/cloud-profile-manager.png" width="12cm" placement="break"/>
+      <xref href="images/cloud-profile-manager.png" format="png" platform="htmlhelp">
+        <image href="images/cloud-profile-manager.png" width="12cm" placement="break">
+          <alt>The Cloud Profile Manager</alt>
+        </image>
+      </xref>
+      <image href="images/cloud-profile-manager.png" width="12cm" placement="break" platform="ohc">
+        <alt>The Cloud Profile Manager</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/cloud-vm-add.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-vm-add.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-vm-add.dita	(revision 99182)
@@ -35,5 +35,12 @@
         <fig id="fig-cloudvm-add">
           <title>Add Cloud Virtual Machine Wizard</title>
-          <image href="images/cloudvm-add.png" width="12cm" placement="break"/>
+          <xref href="images/cloudvm-add.png" format="png" platform="htmlhelp">
+            <image href="images/cloudvm-add.png" width="12cm" placement="break">
+              <alt>Add Cloud Virtual Machine Wizard</alt>
+            </image>
+          </xref>
+          <image href="images/cloudvm-add.png" width="12cm" placement="break" platform="ohc">
+            <alt>Add Cloud Virtual Machine Wizard</alt>
+          </image>
         </fig>
       </li>
Index: trunk/doc/manual/en_US/dita/topics/cloud-vm-new.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-vm-new.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-vm-new.dita	(revision 99182)
@@ -34,5 +34,12 @@
         <fig id="fig-cloudvm-new">
           <title>Create Cloud Virtual Machine Wizard</title>
-          <image href="images/cloudvm-new.png" width="12cm" placement="break"/>
+          <xref href="images/cloudvm-new.png" format="png" platform="htmlhelp">
+            <image href="images/cloudvm-new.png" width="12cm" placement="break">
+              <alt>Create Cloud Virtual Machine Wizard</alt>
+            </image>
+          </xref>
+          <image href="images/cloudvm-new.png" width="12cm" placement="break" platform="ohc">
+            <alt>Create Cloud Virtual Machine Wizard</alt>
+          </image>
         </fig>
       </li>
Index: trunk/doc/manual/en_US/dita/topics/cloud-vm-oci-group.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-vm-oci-group.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-vm-oci-group.dita	(revision 99182)
@@ -19,5 +19,12 @@
     <fig id="fig-cloud-vm-oci-group">
       <title>OCI Group, Containing Cloud VMs</title>
-      <image href="images/cloudvm-oci-group.png" width="10cm" placement="break"/>
+      <xref href="images/cloudvm-oci-group.png" format="png" platform="htmlhelp">
+        <image href="images/cloudvm-oci-group.png" width="10cm" placement="break">
+          <alt>OCI Group, Containing Cloud VMs</alt>
+        </image>
+      </xref>
+      <image href="images/cloudvm-oci-group.png" width="10cm" placement="break" platform="ohc">
+        <alt>OCI Group, Containing Cloud VMs</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/cloud-vm.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/cloud-vm.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/cloud-vm.dita	(revision 99182)
@@ -24,5 +24,12 @@
     <fig id="fig-cloud-vm-overview">
       <title>Cloud VMs, Shown in VirtualBox Manager</title>
-      <image href="images/cloudvm-overview.png" width="12cm" placement="break"/>
+      <xref href="images/cloudvm-overview.png" format="png" platform="htmlhelp">
+        <image href="images/cloudvm-overview.png" width="12cm" placement="break">
+          <alt>Cloud VMs, Shown in VirtualBox Manager</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/cloudvm-overview.png" width="12cm" placement="break">
+        <alt>Cloud VMs, Shown in VirtualBox Manager</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/create-virtual-hard-disk-image.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/create-virtual-hard-disk-image.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/create-virtual-hard-disk-image.dita	(revision 99182)
@@ -22,5 +22,12 @@
         <fig id="fig-virtual-hard-disk-wizard">
           <title>Create Virtual Hard Disk Wizard</title>
-          <image href="images/virtual-hard-disk-wizard.png" width="12cm" placement="break"/>
+          <xref href="images/virtual-hard-disk-wizard.png" format="png" platform="htmlhelp">
+            <image href="images/virtual-hard-disk-wizard.png" width="12cm" placement="break">
+              <alt>Create Virtual Hard Disk Wizard</alt>
+            </image>
+          </xref>
+          <image platform="ohc" href="images/virtual-hard-disk-wizard.png" width="12cm" placement="break">
+            <alt>Create Virtual Hard Disk Wizard</alt>
+          </image>
         </fig>
       </li>
Index: trunk/doc/manual/en_US/dita/topics/create-vm-wizard-hardware.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/create-vm-wizard-hardware.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/create-vm-wizard-hardware.dita	(revision 99182)
@@ -11,5 +11,12 @@
     <fig id="fig-create-vm-hardware">
       <title>Creating a Virtual Machine: Hardware</title>
-      <image href="images/create-vm-3.png" width="10cm" placement="break"/>
+      <xref href="images/create-vm-3.png" format="png" platform="htmlhelp">
+        <image href="images/create-vm-3.png" width="10cm" placement="break">
+          <alt>Creating a Virtual Machine: Hardware</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/create-vm-3.png" width="10cm" placement="break">
+        <alt>Creating a Virtual Machine: Hardware</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/create-vm-wizard-name-os.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/create-vm-wizard-name-os.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/create-vm-wizard-name-os.dita	(revision 99182)
@@ -7,5 +7,12 @@
     <fig id="fig-create-vm-name">
       <title>Creating a Virtual Machine: Name and Operating System</title>
-      <image href="images/create-vm-1.png" width="10cm" placement="break"/>
+      <xref href="images/create-vm-1.png" format="png" platform="htmlhelp">
+        <image href="images/create-vm-1.png" width="10cm" placement="break">
+          <alt>Creating a Virtual Machine: Name and Operating System</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/create-vm-1.png" width="10cm" placement="break">
+        <alt>Creating a Virtual Machine: Name and Operating System</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/create-vm-wizard-unattended-install.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/create-vm-wizard-unattended-install.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/create-vm-wizard-unattended-install.dita	(revision 99182)
@@ -25,5 +25,12 @@
     <fig id="fig-create-vm-unattended-install">
       <title>Creating a Virtual Machine: Unattended Guest OS Installation</title>
-      <image href="images/create-vm-2.png" width="10cm" placement="break"/>
+      <xref href="images/create-vm-2.png" format="png" platform="htmlhelp">
+        <image href="images/create-vm-2.png" width="10cm" placement="break">
+          <alt>Creating a Virtual Machine: Unattended Guest OS Installation</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/create-vm-2.png" width="10cm" placement="break">
+        <alt>Creating a Virtual Machine: Unattended Guest OS Installation</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/create-vm-wizard-virtual-hard-disk.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/create-vm-wizard-virtual-hard-disk.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/create-vm-wizard-virtual-hard-disk.dita	(revision 99182)
@@ -20,5 +20,12 @@
     <fig id="fig-create-vm-hard-disk">
       <title>Creating a New Virtual Machine: Virtual Hard Disk</title>
-      <image href="images/create-vm-4.png" width="10cm" placement="break"/>
+      <xref href="images/create-vm-4.png" format="png" platform="htmlhelp">
+        <image href="images/create-vm-4.png" width="10cm" placement="break">
+          <alt>Creating a New Virtual Machine: Virtual Hard Disk</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/create-vm-4.png" width="10cm" placement="break">
+        <alt>Creating a New Virtual Machine: Virtual Hard Disk</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/diffimages.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/diffimages.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/diffimages.dita	(revision 99182)
@@ -55,5 +55,12 @@
     <fig id="fig-diff-images">
       <title>Differencing Images, Shown in Virtual Media Manager</title>
-      <image href="images/virtual-disk-manager-2.png" width="12cm" placement="break"/>
+      <xref href="images/virtual-disk-manager-2.png" format="png" platform="htmlhelp">
+        <image href="images/virtual-disk-manager-2.png" width="12cm" placement="break">
+          <alt>Differencing Images, Shown in Virtual Media Manager</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/virtual-disk-manager-2.png" width="12cm" placement="break">
+        <alt>Differencing Images, Shown in Virtual Media Manager</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/guestadd-dnd.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/guestadd-dnd.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/guestadd-dnd.dita	(revision 99182)
@@ -58,5 +58,12 @@
     <fig id="fig-drag-drop-options">
       <title>Drag and Drop Menu Options</title>
-      <image href="images/dnd-modes.png" width="10cm" placement="break"/>
+      <xref href="images/dnd-modes.png" format="png" platform="htmlhelp">
+        <image href="images/dnd-modes.png" width="10cm" placement="break">
+          <alt>Drag and Drop Menu Options</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/dnd-modes.png" width="10cm" placement="break">
+        <alt>Drag and Drop Menu Options</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/guestadd-gc-file-manager.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/guestadd-gc-file-manager.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/guestadd-gc-file-manager.dita	(revision 99182)
@@ -23,5 +23,12 @@
     <fig id="fig-guest-control-fm">
       <title>Guest Control File Manager</title>
-      <image href="images/guest-fm.png" width="12cm" placement="break"/>
+      <xref href="images/guest-fm.png" format="png" platform="htmlhelp">
+        <image href="images/guest-fm.png" width="12cm" placement="break">
+          <alt>Guest Control File Manager</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/guest-fm.png" width="12cm" placement="break">
+        <alt>Guest Control File Manager</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/guestossupport.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/guestossupport.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/guestossupport.dita	(revision 99182)
@@ -32,4 +32,5 @@
     <table id="table-premier-support">
       <title>Guest Operating Systems With Full Support</title>
+      <desc>Guest Operating Systems With Full Support</desc>
       <tgroup cols="2">
         <thead>
@@ -235,4 +236,5 @@
     <table id="table-limited-support">
       <title>Legacy Guest Operating Systems With Limited Support</title>
+      <desc>Legacy Guest Operating Systems With Limited Support</desc>
       <tgroup cols="2">
         <thead>
Index: trunk/doc/manual/en_US/dita/topics/gui-details.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/gui-details.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/gui-details.dita	(revision 99182)
@@ -12,5 +12,12 @@
     <fig id="fig-vbox-details-pane">
       <title>VirtualBox Manager Details Pane, Including Toolbar</title>
-      <image href="images/details-pane.png" width="12cm" placement="break"/>
+      <xref href="images/details-pane.png" format="png" platform="htmlhelp">
+        <image href="images/details-pane.png" width="12cm" placement="break">
+          <alt>VirtualBox Manager Details Pane, Including Toolbar</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/details-pane.png" width="12cm" placement="break">
+        <alt>VirtualBox Manager Details Pane, Including Toolbar</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/gui-tools-global.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/gui-tools-global.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/gui-tools-global.dita	(revision 99182)
@@ -14,5 +14,12 @@
     <fig id="fig-global-tools-menu">
       <title>Global Tools Menu</title>
-      <image href="images/global-tools-menu.png" width="10cm" placement="break"/>
+      <xref href="images/global-tools-menu.png" format="png" platform="htmlhelp">
+        <image href="images/global-tools-menu.png" width="10cm" placement="break">
+          <alt>Global Tools Menu</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/global-tools-menu.png" width="10cm" placement="break">
+        <alt>Global Tools Menu</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/gui-tools-machine.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/gui-tools-machine.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/gui-tools-machine.dita	(revision 99182)
@@ -17,5 +17,12 @@
     <fig id="fig-machine-tools-menu">
       <title>Machine Tools Menu</title>
-      <image href="images/machine-tools-menu.png" width="10cm" placement="break"/>
+      <xref href="images/machine-tools-menu.png" format="png" platform="htmlhelp">
+        <image href="images/machine-tools-menu.png" width="10cm" placement="break">
+          <alt>Machine Tools Menu</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/machine-tools-menu.png" width="10cm" placement="break">
+        <alt>Machine Tools Menu</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/gui-virtualboxmanager.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/gui-virtualboxmanager.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/gui-virtualboxmanager.dita	(revision 99182)
@@ -24,5 +24,12 @@
     <fig id="fig-vbox-manager-initial">
       <title>VirtualBox Manager, Showing Welcome Screen After Initial Startup</title>
-      <image href="images/virtualbox-main-empty.png" width="12cm" placement="break"/>
+      <xref href="images/virtualbox-main-empty.png" format="png" platform="htmlhelp">
+        <image href="images/virtualbox-main-empty.png" width="12cm" placement="break">
+          <alt>VirtualBox Manager, Showing Welcome Screen After Initial Startup</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/virtualbox-main-empty.png" width="12cm" placement="break">
+        <alt>VirtualBox Manager, Showing Welcome Screen After Initial Startup</alt>
+      </image>
     </fig>
     <p><xref href="#gui-virtualboxmanager/fig-vbox-manager-populated"/> shows how VirtualBox Manager
@@ -31,5 +38,12 @@
     <fig id="fig-vbox-manager-populated">
       <title>VirtualBox Manager Window, After Creating Virtual Machines</title>
-      <image href="images/virtualbox-main.png" width="12cm" placement="break"/>
+      <xref href="images/virtualbox-main.png" format="png" platform="htmlhelp">
+        <image href="images/virtualbox-main.png" width="12cm" placement="break">
+          <alt>VirtualBox Manager Window, After Creating Virtual Machines</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/virtualbox-main.png" width="12cm" placement="break">
+        <alt>VirtualBox Manager Window, After Creating Virtual Machines</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/gui-vmgroups.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/gui-vmgroups.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/gui-vmgroups.dita	(revision 99182)
@@ -16,5 +16,12 @@
     <fig id="fig-vm-groups">
       <title>Groups of Virtual Machines</title>
-      <image href="images/vm-groups.png" width="10cm" placement="break"/>
+      <xref href="images/vm-groups.png" format="png" platform="htmlhelp">
+        <image href="images/vm-groups.png" width="10cm" placement="break">
+          <alt>Groups of Virtual Machines</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/vm-groups.png" width="10cm" placement="break">
+        <alt>Groups of Virtual Machines</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/host-key-customize.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/host-key-customize.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/host-key-customize.dita	(revision 99182)
@@ -22,4 +22,5 @@
     <table id="table-host-key-customize">
       <title>Host Key Customization</title>
+      <desc>Host Key Customization</desc>
       <tgroup cols="3">
         <thead>
Index: trunk/doc/manual/en_US/dita/topics/intro-save-machine-state.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/intro-save-machine-state.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/intro-save-machine-state.dita	(revision 99182)
@@ -15,5 +15,12 @@
     <fig id="fig-vm-close">
       <title>Closing Down a Virtual Machine</title>
-      <image href="images/vm-close.png" width="10cm" placement="break"/>
+      <xref href="images/vm-close.png" format="png" platform="htmlhelp">
+        <image href="images/vm-close.png" width="10cm" placement="break">
+          <alt>Closing Down a Virtual Machine</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/vm-close.png" width="10cm" placement="break">
+        <alt>Closing Down a Virtual Machine</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/keyb_mouse_normal.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/keyb_mouse_normal.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/keyb_mouse_normal.dita	(revision 99182)
@@ -44,5 +44,12 @@
     <fig id="fig-host-key">
       <title>Host Key Setting on the Virtual Machine Taskbar</title>
-      <image href="images/vm-hostkey.png" width="7cm" placement="break"/>
+      <xref href="images/vm-hostkey.png" format="png" platform="htmlhelp">
+        <image href="images/vm-hostkey.png" width="7cm" placement="break">
+          <alt>Host Key Setting on the Virtual Machine Taskbar</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/vm-hostkey.png" width="7cm" placement="break">
+        <alt>Host Key Setting on the Virtual Machine Taskbar</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/log-viewer.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/log-viewer.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/log-viewer.dita	(revision 99182)
@@ -13,5 +13,12 @@
     <fig id="fig-log-viewer-tool">
       <title>Log Viewer Tool, Showing System Events</title>
-      <image href="images/log-viewer.png" width="10cm" placement="break"/>
+      <xref href="images/log-viewer.png" format="png" platform="htmlhelp">
+        <image href="images/log-viewer.png" width="10cm" placement="break">
+          <alt>Log Viewer Tool, Showing System Events</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/log-viewer.png" width="10cm" placement="break">
+        <alt>Log Viewer Tool, Showing System Events</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/networkingmodes.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/networkingmodes.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/networkingmodes.dita	(revision 99182)
@@ -103,4 +103,5 @@
     <table id="table-networking-modes">
       <title>Overview of Networking Modes</title>
+      <desc>Overview of Networking Modes</desc>
       <tgroup cols="6">
         <colspec align="left"/>
Index: trunk/doc/manual/en_US/dita/topics/ovf-import-appliance.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/ovf-import-appliance.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/ovf-import-appliance.dita	(revision 99182)
@@ -25,5 +25,12 @@
         <fig id="fig-import-appliance">
           <title>Import Virtual Appliance Wizard: Appliance Settings</title>
-          <image href="images/ovf-import.png" width="12cm" placement="break"/>
+          <xref href="images/ovf-import.png" format="png" platform="htmlhelp">
+            <image href="images/ovf-import.png" width="12cm" placement="break">
+              <alt>Import Virtual Appliance Wizard: Appliance Settings</alt>
+            </image>
+          </xref>
+          <image platform="ohc" href="images/ovf-import.png" width="12cm" placement="break">
+            <alt>Import Virtual Appliance Wizard: Appliance Settings</alt>
+          </image>
         </fig>
       </li>
Index: trunk/doc/manual/en_US/dita/topics/pcspeaker_passthrough.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/pcspeaker_passthrough.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/pcspeaker_passthrough.dita	(revision 99182)
@@ -27,4 +27,5 @@
     <table id="table-pcspeaker-config">
       <title>PC Speaker Configuration Options</title>
+      <desc>PC Speaker Configuration Options</desc>
       <tgroup cols="3">      
         <thead>
Index: trunk/doc/manual/en_US/dita/topics/seamlesswindows.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/seamlesswindows.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/seamlesswindows.dita	(revision 99182)
@@ -33,5 +33,12 @@
     <fig id="fig-seamless-windows">
       <title>Seamless Windows on a Host Desktop</title>
-      <image href="images/seamless.png" width="14cm" placement="break"/>
+      <xref href="images/seamless.png" format="png" platform="htmlhelp">
+        <image href="images/seamless.png" width="14cm" placement="break">
+          <alt>Seamless Windows on a Host Desktop</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/seamless.png" width="14cm" placement="break">
+        <alt>Seamless Windows on a Host Desktop</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/settings-storage.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/settings-storage.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/settings-storage.dita	(revision 99182)
@@ -32,5 +32,12 @@
     <fig id="fig-storage-settings">
       <title>Storage Settings for a Virtual Machine</title>
-      <image href="images/vm-settings-harddisk.png" width="10cm" placement="break"/>
+      <xref href="images/vm-settings-harddisk.png" format="png" platform="htmlhelp">
+        <image href="images/vm-settings-harddisk.png" width="10cm" placement="break">
+          <alt>Storage Settings for a Virtual Machine</alt>
+        </image>
+      </xref>
+      <image platform="ohc" href="images/vm-settings-harddisk.png" width="10cm" placement="break">
+        <alt>Storage Settings for a Virtual Machine</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/snapshots-take-restore-delete.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/snapshots-take-restore-delete.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/snapshots-take-restore-delete.dita	(revision 99182)
@@ -78,8 +78,15 @@
             one.
           </p>
-                        <fig id="fig-snapshots-list">
-                           <title>Snapshots List For a Virtual Machine</title>
-                           <image href="images/snapshots-2.png" width="10cm" placement="break"/>
-                        </fig>
+                       <fig id="fig-snapshots-list">
+                         <title>Snapshots List For a Virtual Machine</title>
+                         <xref href="images/snapshots-2.png" format="png" platform="htmlhelp">
+                           <image href="images/snapshots-2.png" width="10cm" placement="break">
+                             <alt>Snapshots List For a Virtual Machine</alt>
+                           </image>
+                         </xref>
+                         <image platform="ohc" href="images/snapshots-2.png" width="10cm" placement="break">
+                           <alt>Snapshots List For a Virtual Machine</alt>
+                         </image>
+                       </fig>
                         <p>
             Oracle VM VirtualBox imposes no limits on the number of snapshots
Index: trunk/doc/manual/en_US/dita/topics/snapshots.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/snapshots.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/snapshots.dita	(revision 99182)
@@ -20,8 +20,15 @@
       displayed.
     </p>
-               <fig id="fig-snapshots-tool">
-                  <title>Snapshots Tool, Showing Snapshot Properties</title>
-                  <image href="images/snapshots-1.png" width="10cm" placement="break"/>
-               </fig>
+              <fig id="fig-snapshots-tool">
+                <title>Snapshots Tool, Showing Snapshot Properties</title>
+                <xref href="images/snapshots-1.png" format="png" platform="htmlhelp">
+                  <image href="images/snapshots-1.png" width="10cm" placement="break">
+                    <alt>Snapshots Tool, Showing Snapshot Properties</alt>
+                  </image>
+                </xref>
+                <image platform="ohc" href="images/snapshots-1.png" width="10cm" placement="break">
+                  <alt>Snapshots Tool, Showing Snapshot Properties</alt>
+                </image>
+              </fig>
                <p>
       If you select multiple VMs in the machine list, all snapshots are
Index: trunk/doc/manual/en_US/dita/topics/soft-keyb.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/soft-keyb.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/soft-keyb.dita	(revision 99182)
@@ -27,7 +27,11 @@
       <title>Soft Keyboard in a Guest Virtual Machine</title>
       <xref href="images/softkeybd.png" format="png" platform="htmlhelp">
-        <image href="images/softkeybd.png" width="14cm" placement="break" id="image_u5k_f4r_wwb"/>
+        <image href="images/softkeybd.png" width="14cm" placement="break">
+          <alt>Soft Keyboard in a Guest Virtual Machine</alt>
+        </image>
       </xref>
-      <image platform="ohc" href="images/softkeybd.png" width="14cm" placement="break" id="image_u5k_f4r_wwb"/>
+      <image platform="ohc" href="images/softkeybd.png" width="14cm" placement="break">
+        <alt>Soft Keyboard in a Guest Virtual Machine</alt>
+      </image>
     </fig>
     <p>
Index: trunk/doc/manual/en_US/dita/topics/vboxconfigdata-summary-locations.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/vboxconfigdata-summary-locations.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/vboxconfigdata-summary-locations.dita	(revision 99182)
@@ -11,4 +11,5 @@
     <table id="table-config-summary">
       <title>Configuration File Locations</title>
+      <desc>Configuration File Locations</desc>
       <tgroup cols="2">
         <thead>
Index: trunk/doc/manual/en_US/dita/topics/vboxwatchdog-linux.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/vboxwatchdog-linux.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/vboxwatchdog-linux.dita	(revision 99182)
@@ -24,4 +24,5 @@
     <table id="table-vboxwatchdog-config-params">
       <title>Oracle VM VirtualBox Watchdog Configuration Parameters</title>
+      <desc>Oracle VM VirtualBox Watchdog Configuration Parameters</desc>
       <tgroup cols="3">       
         <thead>
Index: trunk/doc/manual/en_US/dita/topics/vboxwebsrv-linux.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/vboxwebsrv-linux.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/vboxwebsrv-linux.dita	(revision 99182)
@@ -18,4 +18,5 @@
     <table id="table-websrv-config-params">
       <title>Web Service Configuration Parameters</title>
+      <desc>Web Service Configuration Parameters</desc>
       <tgroup cols="3">       
         <thead>
Index: trunk/doc/manual/en_US/dita/topics/virtual-media-manager.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/virtual-media-manager.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/virtual-media-manager.dita	(revision 99182)
@@ -32,8 +32,15 @@
       VirtualBox Manager.
     </p>
-               <fig id="fig-virtual-media-manager">
-                  <title>The Virtual Media Manager, Showing Hard Disk Images</title>
-                  <image href="images/virtual-disk-manager.png" width="12cm" placement="break"/>
-               </fig>
+              <fig id="fig-virtual-media-manager">
+                <title>The Virtual Media Manager, Showing Hard Disk Images</title>
+                <xref href="images/virtual-disk-manager.png" format="png" platform="htmlhelp">
+                  <image href="images/virtual-disk-manager.png" width="12cm" placement="break">
+                    <alt>The Virtual Media Manager, Showing Hard Disk Images</alt>
+                  </image>
+                </xref>
+                <image platform="ohc" href="images/virtual-disk-manager.png" width="12cm" placement="break">
+                  <alt>The Virtual Media Manager, Showing Hard Disk Images</alt>
+                </image>
+              </fig>
                <p>
       The known media are conveniently grouped in separate tabs for the
Index: trunk/doc/manual/en_US/dita/topics/vm-activity-overview.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/vm-activity-overview.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/vm-activity-overview.dita	(revision 99182)
@@ -20,9 +20,16 @@
         <b outputclass="bold">VM Activity Overview</b> window is
         shown.
-      </p>
-                  <fig id="fig-vm-activity-overview-widget">
-                     <title>VM Activity Overview Tool</title>
-                     <image href="images/vm-activity-overview.png" width="12cm" placement="break"/>
-                  </fig>
+      </p>   
+                 <fig id="fig-vm-activity-overview-widget">
+                   <title>VM Activity Overview Tool</title>
+                   <xref href="images/vm-activity-overview.png" format="png" platform="htmlhelp">
+                     <image href="images/vm-activity-overview.png" width="12cm" placement="break">
+                       <alt>VM Activity Overview Tool</alt>
+                     </image>
+                   </xref>
+                   <image platform="ohc" href="images/vm-activity-overview.png" width="12cm" placement="break">
+                     <alt>VM Activity Overview Tool</alt>
+                   </image>
+                 </fig>
                   <p>
         To show metrics for <i>all</i> virtual machines,
Index: trunk/doc/manual/en_US/dita/topics/vm-activity-session-information.dita
===================================================================
--- trunk/doc/manual/en_US/dita/topics/vm-activity-session-information.dita	(revision 99172)
+++ trunk/doc/manual/en_US/dita/topics/vm-activity-session-information.dita	(revision 99182)
@@ -52,8 +52,15 @@
         guest VM.
       </p>
-                  <fig id="fig-vm-session-information">
-                     <title>Session Information Dialog, Showing VM Activity Tab</title>
-                     <image href="images/session-information.png" width="12cm" placement="break"/>
-                  </fig>
+                 <fig id="fig-vm-session-information">
+                   <title>Session Information Dialog, Showing VM Activity Tab</title>
+                   <xref href="images/session-information.png" format="png" platform="htmlhelp">
+                     <image href="images/session-information.png" width="12cm" placement="break">
+                       <alt>Session Information Dialog, Showing VM Activity Tab</alt>
+                     </image>
+                   </xref>
+                   <image platform="ohc" href="images/session-information.png" width="12cm" placement="break">
+                     <alt>Session Information Dialog, Showing VM Activity Tab</alt>
+                   </image>
+                 </fig>
                </body>
                
