A dynamic index may list physical items in the changing vicinity of a user
or a generator of the index. The vicinity may be within the same space as
the user or the generator, such as a store, a library, a shelf, an aisle,
within a given radius, a street, a city, a campus, a building, an area
and a park. The index may store information about the physical items near
the user or generator, such as content found on tags associated with the
physical items. The content might be a description of the physical items
and their locations. The present invention also includes a system and
method to generate such a dynamic index.