+ <table frame="topbot" rowsep="0" colsep="0" role="grammar">
+ <title>csymbol</title>
+ <tgroup cols="4">
+ <tbody>
+ <row>
+ <entry id="grammar.csymbol">&csymbol;</entry>
+ <entry>::=</entry>
+ <entry><emphasis role="bold">'</emphasis>&id;</entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>
+ <table frame="topbot" rowsep="0" colsep="0" role="grammar">
+ <title>symbol</title>
+ <tgroup cols="4">
+ <tbody>
+ <row>
+ <entry id="grammar.symbol">&symbol;</entry>
+ <entry>::=</entry>
+ <entry><emphasis role="bold">〈〈None of the above〉〉</emphasis></entry>
+ </row>
+ </tbody>
+ </tgroup>
+ </table>