Graph databases come with enhanced connectivity of data and whiteboard friendly paradigm. It requires learning a new Graph Traversal Language, that crawls the network and brings informations. It's indeed a fresh new look at how we store web of data and search for it. We'll meet gremlin, from Apache TinkerPop, which provides an abstract layer that make it easy to express your business logic without fighting with the code, and several Open Source graph databases, available for testing and toying.

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