GeographicUnit - Properties and Relationships — DDI 4.0 dev documentation

# GeographicUnit - Properties and Relationships

## Properties

Name | Type | Cardinality
--- | --- | ---
geographicTime | DateRange | 0..1
precedes | SpatialRelationship | 0..n
supercedes | SpatialRelationship | 0..n

### geographicTime

The period for which the Geographic Unit is valid. Note that the geographic extent, name, or composition change within the valid period of this unit.

### precedes

The Geographic Unit is superceded by (precedes immediately in time) the described geographic unit. Repeat for multiple geographic units.

### supercedes

The Geographic Unit supercedes (follows immediately in time) the described geographic unit. Repeat for multiple geographic units.

## Relationships

Name | Type | Cardinality
--- | --- | ---
hasGeographicExtent | GeographicExtent | 0..n

### hasGeographicExtent

Describes the geographic extent or coverage of the geographic unit during the specified period of time.