1. A method for accessing and organizing tag-related data, the method being implemented by at least one computer including one or more processors and comprising: accessing data associated with one or more entities, said entities associated with one or more tags having one or more tag identifiers, said data being stored in one or more data repositories; accessing data associated with one or more tags having one or more tag identifiers, said data associated with the one or more tags being stored in one or more data repositories, wherein said data associated with the one or more tags includes one or more tag references that associate a tag identifier of said one or more tag identifiers to one or more other tag identifiers of said one or more tag identifiers according to a hierarchy; linking the accessed entity data associated with the one or more entities together with the accessed data associated with the one or more tags using said one or more tag identifiers; receiving at least one query or keyword search; determining two or more of said tag identifiers that satisfy said query or keyword search; and ranking said determined two or more tag identifiers based on tag references of said determined two or more tag identifiers.