DATA - Data Architecture > Business Glossary > Defining Business Information > Concept or Individual States > Using periods
Using periods
A period adds time-related information to an individual event.
*An individual event represents an event occurring during the life of the individual. It is an instance of an event concept of the concept to which the individual is connected.
For example, a free loan may be offered to subscribers on each anniversary. This loan is valid for a period of two weeks after the anniversary date.
A period type is used to specify an event concept.
*An event concept represents an event occurring during concept life, for example a change of season. An event concept marks the impact on a concept of a phenomenon internal or external to the concept. Concept events can be distinguished as concept start events, end events and intermediate events.
For example, a free anniversary loan is offered every year.
The relationship between a Period type and an Individual event is described by an Event type periodization.
The relationship between a Period and an Event concept is described by an Event periodization.