12. The non-transitory computer-readable volatile or non-volatile storage medium of claim 10 , wherein storing the index entry is performed in response to receiving a registration request from a service provider or program that is used to generate collection items.
12. The non-transitory computer-readable volatile or non-volatile storage medium of claim 10 , wherein storing the index entry is performed in response to receiving a registration request from a service provider or program that is used to generate collection items. 13. The non-transitory computer-readable volatile or non-volatile storage medium of claim 12 , wherein the metadata includes one or more keywords about the first collection item, wherein the one or more keywords about the first collection item includes a user-generated tag.