R-Tree and R-star-Tree
----------------------

-  CGAL/R_tree.h

R-tree implementation


-  CGAL/R_tree_key.h

Predefined k-dimensional bounding boxes as keys k=1,...,4

-  CGAL/R_tree_traits_implementation.h 

Predefined traits class that works for the predefined keys. Can
be plugged into the tree.

-  CGAL/R_tree_index.h

Predefined index structure, to be plugged into the tree
(Guttman strategies)


-  CGAL/R_star_tree_index.h 

Predefined R-star tree index structure, to be plugged into the
tree
(BKSS90)


-  CGAL/R_tree_index_implementations.h

All components of the predefined index structures.


-  CGAL/R_tree_internal_storage.h

Predefined internal memory database. Can directly be plugged into
the tree.


-  CGAL/R_tree_external_storage.h

Predefined external memory database. Can directly be plugged into
the tree.


-  CGAL/R_tree_internal_db.h 

defines the internal memory database as database


-  CGAL/R_tree_external_db.h 

defines the external memory database as database


-  CGAL/IO_tree_traits.h 
	
traits class to CGAL/internal_memory.h and CGAL/cache.h 


-  CGAL/internal_memory.h

internal memory database


-  CGAL/cache.h  

external memory database with cache or not.