Selection of the references earlier than a year

As is the case for other commands, the addition of an option and a parameter allows to perform selections of the information to retrieve.

Each record in the original catalogue contains the year of publication. This make an easy criterion to make selection.

With the option -lt , one can extract the bibliographic information published before than the given year. The syntax of the command bdp is:

bdp -lt "year limit"

The previous item describes the reverse action.

Example:

bdp -lt 1900 selects the references published before than 1900