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Variable Groups are used to group together closely related variables. Under the DDI each system of categories is defined as a separate variable, so for example a variable categorising ages into five year bands running up to '95 and over' is a separate variable from one giving ages to '100 and up'. However, we group these into a single Variable Group covering ages.
Themes, which organise the database into broad topics:
| Entity ID | Entity Name |
|---|---|
| T_LAND | Agriculture & Land Use |
Variable Groups, bringing together related variables :
| Entity ID | Entity Name |
|---|---|
| VG_AGCEN_HORSES | Horses |
| VG_AGCEN_CATTLE | Cattle |
| VG_AGCEN_SHEEP | Sheep |
| VG_AGCEN_PIGS | Pigs |
| VG_POULTRY | Poultry |
Variables, defining what data was gathered for :
| Entity ID | Entity Name |
|---|---|
| V_AGCEN_ANIMALS | Types of animal listed by the Agricultural Census |
| V_AGCEN_GOATS_1961 | Agricultural Census Goat Categories for 1961 |