Instead of tables, data is stored in a graph as node and edge. Both can have stored properties. Check out http://neo4j.com/ http://neo4j.com/ and live examples

Instead of tables, data is stored in a graph as node and edge. Both can have stored properties. Check out http://neo4j.com/ http://neo4j.com/ and live examples using it http://gist.neo4j.org/ http://gist.neo4j.org/