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Entity-attribute-value model ( EAV) is a data model to encode, in a space-efficient manner, entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest.
Entity-attribute-value model - Wikipedia 
Added 2 months ago by Josh Shi
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Entity-attribute-value model - Wikipedia 
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Entity-attribute-value model ( EAV) is a data model to encode, in a space-efficient manner, entities where the number of attributes (properties, parameters) that can be used to describe them is potentially vast, but the number that will actually apply to a given entity is relatively modest.
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