diff --git a/Doc/tools/sgmlconv/conversion.xml b/Doc/tools/sgmlconv/conversion.xml
index e6b20d7618..9df40e3752 100644
--- a/Doc/tools/sgmlconv/conversion.xml
+++ b/Doc/tools/sgmlconv/conversion.xml
@@ -560,6 +560,55 @@
     <child name="entry"/>
     </macro>
 
+  <environment name="tablev" outputname="table">
+    <attribute name="cols">4</attribute>
+    <attribute name="colspec"/>
+    <attribute name="style"/>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    </environment>
+  <environment name="longtablev" outputname="table">
+    <attribute name="cols">4</attribute>
+    <attribute name="colspec"/>
+    <attribute name="style"/>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    </environment>
+  <macro name="linev" outputname="row">
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    <text>
+         </text>
+    <child name="entry"/>
+    </macro>
+
   <!-- These are handled at a later translation stage, at least for now. -->
   <macro name="Cpp" outputname="">
     <text>C++</text>
@@ -679,6 +728,9 @@
   <macro name="kbd" outputname="keysym">
     <content/>
     </macro>
+  <macro name="mailheader">
+    <content/>
+    </macro>
   <macro name="makevar">
     <content/>
     </macro>