10. The method according to claim 8 , wherein the entities are linked to a further entity or node via a link which represents a relation that is not common to all entities linked to the first node.
8. The method according to claim 1 , comprising: representing a plurality of entities having a common relation as a first node on the visualization graph; causing the entities comprised at the first node to be displayed in response to a predetermined stimulus; and causing the graph to restructure so that the entities displayed are replaced by the node in response to a further predetermined stimulus.