1. A method for managing resource identifiers, the method comprising: creating a hierarchical taxonomy for a plurality of resource identifiers, the hierarchical taxonomy being based on a plurality of tags, each of the plurality of tags being associated with at least one of the plurality of resource identifiers and relating to a resource identified by the at least one resource identifier associated with the tag, and one or more hierarchical relationships among the plurality of tags; categorizing the plurality of resource identifiers in accordance with the hierarchical taxonomy; building a hierarchical view of the plurality of resource identifiers based on categorization of the plurality of resource identifiers in accordance with the hierarchical taxonomy; displaying the hierarchical view of the plurality of resource identifiers.