Figure 2.

Illustration of the low-level abstraction mechanism scanning a time series of platelet counts. In this example a trend primitive (TREND) is used with criteria for determining if adjacent platelet values are increasing (PLT incr) or decreasing (PLT decr). The sliding window mechanism (see Design) selects successive sequences with lengths specified in the primitive or abstraction definition. After the intervals are identified, the interval combination procedure (see Design) combines adjacent TREND (PLT incr) intervals and adjacent TREND (PLT decr) intervals.