Structural criteria

Thematic structuring of individual data

The (structural) criterion represents the structuring variable of ISIS . It classifies an object by stating the "values" of a feature used to distinguish between individual objects (items).

Features of a structuring criterion

Every criterion has a criterion code (e.g. B00) and a criterion name (e.g. province).

Specification of code in angle brackets (<>)

Angle brackets indicate as well wether the criterion is <free> or will incur a fee (not specified).

Example

A segment with the segment code Z5Z contains the following criteria:

• Time (time series) and
• province or
• political district or
• NUTS3 unit or
• communes and
• nationality.

For one an the same feature there are several criteria describing it in different degrees of detail. As, for example, the following criteria:

• Commune (the most detailed criterion)
•  NUTS3 unit (may comprise several communes)
• political district (may also comprise several communes)
• province (the roughest criterion)

Between these criteria there is a hierarchical relationship, which is why in presentation, they are characterized as parallel. From parallel criteria, you may chose but one.

The criterion Time holds a special position.