...

To unload the triple store to a set of triples, use jena3tools, available here:  https://github.com/vivo-project/jenatools 

References

1. Borner, Conlon, Corson-Rikert, and Ding (eds) VIVO: A Semantic Approach to Scholarly Networking and Discovery, Morgan-Claypool Publioshers, 2012.  160 pages.
2. Allemang, and Hendler.  Semantic Web for the Working Ontologist, second edition.  Morgan-Kaufmann Publishers, 2011.  354 pages.
3. DuCharme. Learning SPARQL: Querying and Updating with SPARQL 1.1. O'Reilly, 2011. 235 pages.
4. VIVO Book
5. Semantic Web
6. SPARQL book.
7. Barned Mons Book