Polaroid ID-4000 User Manual page 89

5-8 ID-4000 administration
The optional card history feature creates additional .DBF
files containing card history data for each applicant
category. These card history files have the same names
and extension as their corresponding applicant database
files, but they have the prefix "CH." (If your system has
two applicant database files named EMPL.DBF and
VIS.DBF, you will have corresponding card history
database files named CHEMPL.DBF and CHVIS.DBF.)
Each card history database file is located in the same
directory as its corresponding applicant database.
SQL database files
If your ID-4000 uses an SQL database, the database file
has the extension ".DBS". Your database file name and
its directory were determined during system setup, but
the file and the directory have the same name.
Unlike dBase, the SQL format stores all applicant and
card history data in a single SQL database file. Each data
classification (employee data, visitor data, employee
card history data, etc.) is a separate table within the
single database file.
Card history tables within the database file have the
same names as their corresponding applicant data tables
but contain the prefix "CH."