22. A non-transitory computer-readable storage medium as recited in claim 21 , storing one or more further sequences of instructions which, when executed by one or more processors, causes the one or more processors to perform: presenting a guided navigation interface, based on said hierarchical structure, to allow users to navigate to find searchable items that belong to at least one of said plurality of repositories.
22. A non-transitory computer-readable storage medium as recited in claim 21 , storing one or more further sequences of instructions which, when executed by one or more processors, causes the one or more processors to perform: presenting a guided navigation interface, based on said hierarchical structure, to allow users to navigate to find searchable items that belong to at least one of said plurality of repositories. 23. A non-transitory computer-readable storage medium as recited in claim 22 , storing one or more further sequences of instructions which, when executed by one or more processors, causes the one or more processors to perform: receiving user input at said guided navigation interface, that navigates to a display associated with a particular node in said hierarchical structure; and displaying, on said display, an indication of logical attributes of said particular node; wherein the logical attributes of said particular node include logical attributes assigned to said node, and logical attributes assigned to any node from which said particular node descends in said hierarchical structure.