Used to get details about codes and code lists stored by ONS. Codes are used
to provide a common definition when presenting statistics with related categories.
Codes are gathered in code lists, which may change over time to include new or
different codes. The meaning of a code should not change over time, but new codes
may be created where new meaning is required.
[character] A subset of the dataset representing a specific time period.
For some datasets this edition can contain all time periods (all historical data).
The latest version of this is displayed by default.