UD Update Code

(a limit field)

ud=199601-199612

ud>=199801

This field contains the year and month the record was introduced to DOSE or last changed in DOSE in YYYYMM format and is contained in every record. Dates begin in 1996 (when this version of DOSE became available).

UD is a limit field and to search it you must use the field code as shown above in the example searches. It is also range searchable and so you can use the operators greater than (>), less than (<), greater than or equals (>=) and less than or equals (<=). You can also specify a range as in the first example.

Combine a UD search with other retrieval terms to find records that were updated since the last time you searched.