Fig 6. The effect of data integration on visibility.

Data integration can reduce the visibility problem by making some invisible (dashed-line) edges in the SPSD visible (solid-line). The edges newly revealed by using data integration are highlighted by the thick edges. The SPSD of the Boolean function $f\left(\text{A},\text{B}\right)=\overline{\text{A}}\text{B}$ is shown for integrating different types of data. A: Only transcription data (rule R1). B: Transcription data+PPI (rules R1 and R3). C: Transcription data+cis(+PPI) (rules R2 and R3).