"INDEX GOAL: ANALYZED "

Hi there,
I am tracing a piece fof user sql on our system and part of the explain plan im getting out is seen below.

3 VIEW
3 SORT (AGGREGATE)
62 INDEX GOAL: ANALYZED (RANGE SCAN) OF
'UN_CONTENT_CHANNEL_RANK' (UNIQUE)

What im after is an explanation of what the "INDEX GOAL: ANALYZED " part means... I have seached through the 8i tuning manual and not found anything that matches this....

-Bob