Which pin should be connected by Pin 16

Hi,
    In Page 73 - Page 75 of the IBIS Specification Ver3.2, there are the following
lines:

[Path Description] CAS_2
Pin J25
Len = 0.5 L=8.35n C=3.34p R=0.01 /
Node u21.15
Len = 0.5 L=8.35n C=3.34p R=0.01 /
Node u22.15
Len = 0.5 L=8.35n C=3.34p R=0.01 /
Node u23.15

....

[Reference Designator Map]
|
| External Part References:
|
| Ref Des File name Component name
u23 pp100.ibs Pentium(R)__Pro_Processor
u24 simm.ebd 16Meg X 36 SIMM Module
u25 ls244.ibs National 74LS244a
u26 r10K.ibs My_10K_Pullup

I want to know which node of buffer in pp100.ibs(node of B element) pin u23.15
connects to.

Your help is appreciated very much.

--
Best Regards.
Hai-long Wang
Tel:021-62837026x228
Avant! Shanghai R&D Center,  16th Floor, SunTong InfoPort Plaza
No.55, West Huaihai Road, Shanghai, 200030, P.R.China