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A DOMAIN defines a filed technically and therefore it may be used at diffrent business levels
A data element describes the meaning of a domain in a certain business context.
A domain, however, is used for the technical definition of a table field (for example field type and length).
Therefore, although a take-off airport (data element S_FROMAIRP) would have a different business meaning from an airport where a plane lands (data element S_TOAIRP), they could still have the same domain(here S_AIRPID) because technically we could assign the same number of characters whether the airport is a take-off or a landing airport.
Bluesky
