Databases Reference
In-Depth Information
Five Summary Models
A
B
C
D
E
SCU weight
SCU
1
X
X
X
X
4
SCU
2
X
X
X
X
4
SCU
3
X
X
X
3
SCU
4
X
X
X
3
SCU
5
X
X
X
3
SCU
6
X
X
X
3
5
5
4
3
3
Num. of SCUs
In model summary
Figure 2.5:
Sample SCU annotation for five model summaries. The matrix shows what SCUs are
expressed by each model summary. A cross in a cell indicates that the model summary in the corresponding
column is expressing the SCU in the corresponding row. The column on the right show the weight of
each SCU, while the row at the bottom show how many SCUs are expressed in each model summary.
SCU
1
SCU
2
SCU
3
SCU
4
SCU
5
SCU
6
Figure 2.6:
Pyramid representation for our example in Figure
2.5
.The two ovals encircle two possible op-
timal summaries with four SCUs. This figure was inspired by a similar figure in
Nenkova and Passonneau
[
2004
].
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