Abstract: A Resource Description Framework engine is disclosed for performing transactional RDF-based operations against a distributed database. The RDFE manages a local memory cache that stores active portions of the database, and can synchronize those active portions using a transactionally-coherent distributed cache across all database nodes. During RDF reads, the RDFE can identify a triple-store table affected by a given RDF transaction, and can traverse the index objects for that table to locate triple values that satisfy a given RDF query, without intervening SQL operations. The RDFE can also perform SQL transactions or low-level write operations to update triples in triple-store tables. Thus the RDFE can update corresponding index objects contemporaneous with the insertion of RDF triples, with those updates replicated to all database nodes.

Abstract: A method and apparatus is provided for mobile communication device application user to purchase content or functionality for the application while in the midst of using it and without interrupting his user experience. In an embodiment, the user's mobile carrier subscriber account is billed directly for the purchase. The method includes receiving a request for the purchase from the communication device application, where the request includes information about the amount of the purchase. Further, the method includes sending a confirmation request to the communication device. On receiving the confirmation, authenticating the communication device at the public mobile operator network of the communication device. Finally, the method includes providing access to the purchased content or functionality on or in conjunction with the communication device.