lass="identifier">re</span> <span class="special">=</span>
      <span class="string">"([[:Sc:]][[:Cf:][:Cc:][:Z*:]]*)?"</span>
      <span class="string">"([[:Nd:]]+(?:[[:Po:]][[:Nd:]]+)?)?"</span>
      <span class="string">"(?(1)"</span>
         <span class="string">"|(?(2)"</span>
            <span class="string">"[[:Cf:][:Cc:][:Z*:]]*"</span>
         <span class="string">")"</span>
         <span class="string">"[[:Sc:]]"</span>
      <span class="string">")"</span><span class="special">;</span>
   <