Hello experts,

Is there a way to generate an entry without a page number in an register that has page numbers enabled? This would enabled See also entries to be generated with something like 

\setregisterentry[TopicIndex][keys:2=zzz,entries:1=punctuation,entries:2={{\em See also} marking}]%

I do see that there is an alternative key defined for the command, but no explanation of what the alternatives are and if any would help.

--
Rik