Similarly to JPA annotations, you can define constraints, column definitions and other relationships using Java 1.5 annotations. However, Onyx Database's annotation collection is much smaller and easier to work with.
| Annotation | Description |
|---|---|
| @Entity | The Entity annotation is the principal metadata used to indicate an object as persistable. |
| @Identifier | Used to indicate the primary key of an entity. |
| @Attribute | Denote persisted attributes for an entity. |
| @Relationship | Specify entity relationships for an entity. Relationships can be specified as either One to One, One To Many, Many to One, or Many to Many. |
| @Index | Entities with indexed attributes can be quickly identified and accessed within large data stores. |
| @Partition | Onyx has the ability to partition entity stores based on an arbitrary attribute value. Use this annotation in order to specify a partition field. There can only be one partition attribute per entity. |
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