input: [0] 1 [2] Full [3] Example: different routing protocols used in different areas at the same level, routing information must be exchanged through a mutual parent area or areas Note: local path computation has flexibility as to the detail of the route specified beyond the local area [Parent RA info received] 
output: Full
options: R e a c h a b i l i t y
options: F u l l
options: P a r t i a l
options: M i n i m a l
options: C h i l d R A i n f o r e c e i v e d
options: N o n e