uds_idf::update

Source: idf/uds_idf/uds_idf__update.pro

 uds_idf::update
        Find and attach UDS-type idf specifications.

 Usage:
        idfref -> update[, /add_only]

 Keyword:
        add_only        If set, then don't replace instruments already
                        defined. 

 History:
        Original (after init): 6/2/02; SJT
        Replace findfile calls: 15/4/03; SJT
        replace direxist with file_test; 15/4/03; SJT
        Remove VMS support: 15/4/03; SJT