wpu.nu

Sida:Ann-1983 JBC25001-00 James Allen - Maintaining knowledge about temporal intervals.pdf/27

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RI

R2(R1)

R5(R1)

16(R2)

R3(R2)

R4(R2)

13(R3).

/\

Il(R3)

- 12(R3)

14(R4) -15(R4)

Figure 7: A Tree-Like Hierarchy Based on Reference Intervals.

LIFE

d

d

<

m

my

PRESCHOOOL(LIFE) PREGRAD(LIFE)~POSTGRAD(LII'L)

d f

d JOB(POSTGRAD)

S

m

PRIM(PREGRAD) SECOND(PREGRAD) → UNIV(PREGRAD)

<

To

CHESS(PRIM)

WIN(UNIV)

Figure 8: A Typical Reference Hierarchy for A History of a Person