225bdc02_Semantic_Web_URIs__Tree
[Web] Top-down, Bottom-up & middle-out [Tree] 
Top-down elaboration
O O s y s t e m s
I n f o r m a t i o n h i d i n g
S o c i a l H i e r a r c h i e s
T o p - d o w n e l a b o r a t i o n
F i x e d s l o t s
C a n ' t b e a w e b
I n f o s t o r e d w i t h s u b j e c t
O n e I D p e r o b j e c t
Semantic Web URIs
Tree