Desktop Search Engine

Or DSE to make it sort.
It's a search engine, accessible in individual computers, either incorporated in the system, as Spotlight will be, or installed as a standalone software, as Google's or Yahoo!'s soft are.
Without making any guess about those mentioned above, I'll describe what I would expect from a DSE participating to the structure of the Semantic Internet:
While building it's index, it should take a particular care for the indexation of the Public Folder. A separate index, the Public Folder Index should be made, prepared to be send to the General Index.