CalDav datasource - how?

[dsemeniuk]

Running this in zmprov:

cds admin@dimas-quad caldav nztest001 \
zimbraDataSourceConnectionType cleartext \
zimbraDataSourceEnabled TRUE \
zimbraDataSourceFolderId null \
zimbraDataSourceHost localhost \
zimbraDataSourcePort 9221 \
zimbraDataSourceUsername nztest001@gmail.com \
zimbraDataSourcePassword *** \
zimbraDataSourceEmailAddress nztest001@gmail.com \
zimbraDataSourceType caldav

(no back slashes, just for your readability)

gives me the error:

ERROR: service.FAILURE (system failure: unable to determine data source type from object class)

Am I missing something? Probably yes (like path to calendar on the server), but I couldn't find any references to caldav datasources. Anyone help?