GeographicUnitTypeRelation - Properties and Relationships — DDI 4.0 dev documentation

# GeographicUnitTypeRelation - Properties and Relationships

## Properties

Name | Type | Cardinality
--- | --- | ---
hasRelationSpecification | RelationSpecification | 1..1
hasSpatialRelationSpecification | SpatialRelationSpecification | 0..1
isExhaustiveCoverage | Boolean | 0..1
semantic | ExternalControlledVocabularyEntry | 0..1
totality | TotalityType | 0..1

### hasRelationSpecification

Provides information on reflexivity, transitivity, and symmetry of relationship using a descriptive term from an enumeration list

### hasSpatialRelationSpecification

Provides information on the spatial relationship between the parent and child.

### isExhaustiveCoverage

An aggregation of the units of the child Unit Type will result in exhaustive coverage of the parent Unit Type

### semantic

Provide a semantic that provides a context for the relationship using and External Controlled Vocabulary

### totality

Type of relation in terms of its totality using an enumeration list.

## Relationships

Name | Type | Cardinality
--- | --- | ---
realizes | MemberRelation | 0..n
source | UnitType | 0..n
target | UnitType | 0..n

### realizes

Collection class realized by this class

### source

The first member of the relationship.

### target

Second member in the relationship. Notes this could be realized as a collection supporting tuple relationship.