© 2012 triAGENS GmbH | 2012-04-04 52 Graph queries In AvocadoDB, a graph is composition of vertices: the nodes in the graph edges: the relations between nodes in the graph Vertices are stored as documents in regular collections Edges are stored as documents in special edge collections, with each edge having the following attributes: _from id of linked vertex (incoming relation) _to id of linked vertex (outgoing relation) Additionally, all document have an _id attribute The _id values are used for linking in the edges collections