Patent ID: 6920445

Claim:
A content indexing structure stored in a computer-readable medium, comprising: a first indexing level having a plurality of first-level content indexes coupled in a substantially circular manner, a first first-level content index being selected from a first set of first-level content indexes sharing a first category feature as a first representative index for the first set, and a second first-level content index being selected from a second set of first-level content indexes sharing a second category feature as a second representative index for the second set; a second indexing level having a plurality of second-level content indexes coupled in a substantially circular manner, the second-level content indexes corresponding to representative indexes in the first indexing level, wherein a user traverses from the first set of first-level content indexes sharing the first category feature to the second set of first-level content indexes sharing the second category feature in response to a first user action without first invoking the second indexing level, and traverses second-level content indexes and representative indexes in the first indexing level in response to a second user action.