Methodologies of Multiple Level Data Mining
Progressive generalization (roll-up: easy to implement).
Progressive deepening (drill-down: conceptually desirable).
- Start at a rather high level, find strong regularities at
such a level
- Selectively and progressively deepen the knowledge
mining process down to deeper levels to find regularities
at lower levels.
Interactive up and down:
- Roll-up and drill-down to different levels, including
setting different thresholds and focuses.
Implementation: save a "minimally generalized relation".
- Specialization of a generalized relation: Generalize the
minimally generalized relation to appropriate levels.