Relationships (Data Modeling)

Updated 22 Jul 2026

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def
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  connections between Data Objects that express how they are related to one another
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determining relationships
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  understand the roles of each data object
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  define object/relationship pairs that capture the relevant connections
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example
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  data objects: Book and Bookstore
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  relationships: orders, displays, stocks, sells, returns
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quantified by
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  Cardinality — how many occurrences can be related
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  Modality — whether the relationship is mandatory or optional
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related
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  Data Modeling
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  Data Object
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  Cardinality
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  Modality

Linked references 6