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Facts for a Musicians in a Band
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The FACTS define the Business Rules ...

1. What are the 'Things of Interest' in the Scope to be modelled ...

2. How are these 'Things of Interest' related ? ...

3. What do we know about the 'Things of Interest' ? ...

In the Data Model, an 'id' field, such as person_id, is a generated integer, without any meaning in itself, and is used as a surrogate key.
A 'code' field is an abbrevation of a name or description, and used because the volumes of data are smaller, and do not need to be generated dynamically.


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