lib/metanorma/itu/basicdoc.rng in metanorma-itu-2.1.13 vs lib/metanorma/itu/basicdoc.rng in metanorma-itu-2.2.0

@@ -681,9 +681,12 @@
       </zeroOrMore>
     </element>
   </define>
   <define name="underline">
     <element name="underline">
+      <optional>
+        <attribute name="style"/>
+      </optional>
       <zeroOrMore>
         <ref name="PureTextElement"/>
       </zeroOrMore>
     </element>
   </define>