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8. Jena: RDF in Java > 8.4. In-Memory Versus Persistent Model Storage

In-Memory Versus Persistent Model Storage

All the examples to this point have used the memory model, but Jena also provides the capability to persist data to relational database storage. The databases supported are MySQL, PostgreSQL, Interbase, and Oracle. Within each database system, Jena also supports differing storage layouts:

Generic

All statements are stored in a single table, and resources and literals are indexed using integer identifiers generated by the database.

GenericProc

Similar to generic, but data access is through stored procedures.

MMGeneric

Similar to generic but can store multiple models.

Hash

Similar to generic but uses MD5 hashes to generate the identifiers.


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