Dproj field-list [ input-file.. ]
Dproj limits the fields to the given field names. For each input record, Dproj discards the fields not listed in the field-list, and outputs the remaining fields as a D-record. When no filed is remained (i.e., there is no listed field in the record) no output is made for the record.
The field-list may be an exclusive list (i.e., lead by "^"). In this case, listed fields are discarded from the input records.
(This program is called Dproj from the relational operation "projection", though it is not really a "relational".)
See the manual of D_msg.
MIYAZAWA Akira