Indicator¶
An indicator is a quantity that is a ratio of a numerator and denominator that are also quantities. It has a city and time period associated with it. The numerator and denominator quantities can have different units of measure. One example of a unit of measure is the size of a population. A population_cardinality_unit is defined to be an individual of a Cardinality_unit that is a subclass of a Singular_unit.
IRI: https://w3id.org/citydata/21972/v1/Indicator
Diagram¶
Specializations of Indicator¶
| Class | Description |
|---|---|
| Difference Indicator | Difference between term_1 and term_2 (term_1 - term_2) |
| Ratio Indicator | |
| Sum Indicator | Sum of term_1 and term_2 (term_1 + term_2) |
Formalization for Indicator¶
| Property | Constraint |
|---|---|
| for_city | exactly 1 |
| for_city | exactly 1 City |
| for_time_interval | exactly 1 |
| for_time_interval | exactly 1 time:DateTimeInterval |
| subClassOf | ISO21972Thing |
| subClassOf | Quantity |