[mkgmap-dev] Searching for postal_code

Hi all, short question. In the style files I use the following lines: mkgmap:postal_code!=* & addr:postcode=* { set mkgmap:postal_code='${addr:postcode}' } mkgmap:postal_code!=* & openGeoDB:postal_codes=* { set mkgmap:postal_code='${openGeoDB:postal_codes}' } mkgmap:postal_code!=* & mkgmap:postcode=* { set mkgmap:postal_code='${mkgmap:postalcode}' } But in Mapsource (or Garmin/Basecamp), I couldn't search for postal_codes. So what I'm doing wrong? Cheers Martin