literal element db v5

I'm transforming from a 'visual' markup language (a wiki)
and I've come across 'monospace' as markup.

My best guess docbook 5 equivalent would be literal.
In order to not lose the semantics, I want looking
for the role attribute. literal has common
attributes, but role isn't one of them?

yet in the xi schema I see
   <define name="db.literal.role.attribute">
       <attribute name="role"/>
     </define>
     <define name="db.literal.attlist">
       <interleave>
         <optional>
           <ref name="db.literal.role.attribute"/>
         </optional>
         <ref name="db.common.attributes"/>
         <ref name="db.common.linking.attributes"/>
       </interleave>
     </define>
     <define name="db.literal">
       <element name="literal">
         <a:documentation>Inline text that is some literal 
value</a:documentation>
         <ref name="db.literal.attlist"/>
         <ref name="db._text"/>
       </element>

Is this a docbook omission?

regards



-- 
Dave Pawson
XSLT XSL-FO FAQ.
http://www.dpawson.co.uk