14. A method comprising: accessing a specification identifying a model of a navigable semantic network, the model defining resource nodes and relationships amongst the resource nodes in the navigable semantic network; in accordance with the model, instantiating a portion of the navigable semantic network from a perspective of a given resource node in the navigable semantic network; and providing access to the instantiated portion of the navigable semantic network to enable rendering of the portion of the navigable semantic network on a display screen.
14. A method comprising: accessing a specification identifying a model of a navigable semantic network, the model defining resource nodes and relationships amongst the resource nodes in the navigable semantic network; in accordance with the model, instantiating a portion of the navigable semantic network from a perspective of a given resource node in the navigable semantic network; and providing access to the instantiated portion of the navigable semantic network to enable rendering of the portion of the navigable semantic network on a display screen. 17. The method as in claim 14 further comprising: initiating display of the instantiated portion of the navigable semantic network on the display screen as a social network, the instantiated portion of the navigable semantic network on the display screen including the given resource node displayed as a focal node and a set of resource nodes displayed around the given resource node.