JSON, DATA-GEN, YAJLDTAGEN, and Null

I'm attempting to generate a JSON using DATA-GEN opcode and YAJLs YAJLDTAGEN. It is working great and I'm liking it a lot. I haven't been able to figure out how to set a value to NULL ("LocationId":null).

In the mainline, I'm setting the null indicator on the field in the DS (%nullind(jsonDoc.data(x).LocationId) when necessary. I do have the nullind on the field in the data structure that I indicate in DATA-GEN and thought that might do it (see below). Any thoughts?

I'll debug YAJLDTAGEN next.

dcl-ds jsonDoc qualified;
num_data int(10) inz(0);
dcl-ds data dim(100);
LocationId varchar(4) inz(' ') nullind;
ItemId varchar(12) inz(' ');
Price packed(9:3) inz(0);
End-ds;
End-ds;