I'm working on a project on mobile RDF databases for Android. Therefore I'm looking for open source databases to include in my Android project. However, it's difficult for me to find mobile versions of existing RDF databases.

What I've found so far:

* Jena TDB database
* [Oracle Berkeley database](http://www.oracle.com/technetwork/products/berkeleydb/overview/index.html)

Unfortunately I haven't found mobile versions of Sesame, Virtuoso, AllegroGraph, etc.

Does anyone know some other RDF databases for Android?