Figure 1.

Temporal abstraction in a clinical domain. Raw patient data are plotted over time at the bottom. External events (interventions) and the abstractions computed from the data are plotted as intervals at the top. BMT indicates a bone-marrow-transplantation event (external intervention); PAZ, a prednizone/azathioprine therapy protocol for treating chronic graft-versus-host disease (CGVHD), a complication of BMT. Solid dots indicate platelet counts; triangles, granulocyte counts. The staggered interval bar (“PAZ protocol”) indicates an event interval; the hatched right-pointing arrow (“expected CGVHD”), a context interval; and the solid interval bars, abstraction intervals. M[n] indicates bone marrow toxicity (myelotoxicity) grande n.