Defining a code table – PB Docs 2019

To reduce storage needs, frequently you might want to store short,
encoded values in the database, but these encoded values might not be
meaningful to users. To make DataWindow objects easy to use, you can
define code tables.

Each row in a code table is a pair of corresponding values: a
display value and a data value. The display values are those users see
at runtime. The data values are those that are saved in the
database.