24.1.48. @MapsId
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The [`@MapsId`](http://docs.oracle.com/javaee/7/api/javax/persistence/MapsId.html) annotation is used to specify that the entity identifier is mapped by the current annotated `@ManyToOne` or `@OneToOne` association.
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See the [`@MapsId` mapping](#identifiers-derived-mapsid) section for more info.
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