D'oh, it's oor:separator. Thanks to dtardon for pointing it out to me

I guess it would be futile to expect some warning at run-time about an
unrecognized attribute.

Change-Id: I04ccaa6df8ec932f747384486174c1fd23eb110a

officecfg/registry/schema/org/openoffice/Office/Calc.xcs

@@ -1401,7 +1401,7 @@
           <info>
             <desc>Like OpenCLWhiteList, but for combinations known to be bad.</desc>
           </info>
-          <value separator=";">Windows/*/Intel(R) Corporation/9.17.10.2884;SuperOS/1.0/Big Corp, Inc./2.3\/beta</value>
+          <value oor:separator=";">Windows/*/Intel(R) Corporation/9.17.10.2884;SuperOS/1.0/Big Corp, Inc./2.3\/beta</value>
         </prop>
       </group>
       <group oor:name="Syntax">