Randy, I agree with the changes but why: Each line must contain either three, five or six entries. Three entries would be for pulldown_ref, pullup_ref. Can one have a pulldown_ref and a gnd_clamp_ref and they be different? Can one have a pullup_ref and a power_clamp_ref and they be different? Why can we not simplify and have: Sub-Params: power_ref, gnd_ref, ext_ref Walter From: Randy Wolff (rrwolff) [mailto:rrwolff@xxxxxxxxxx] Sent: Wednesday, October 08, 2014 6:14 PM To: Walter Katz; IBIS-Interconnect Subject: RE: New keyword [Buffer Rail Mapping] Walter, I made some editorial changes. Let me know if these don't make sense to you. Thanks, Randy From: ibis-interconn-bounce@xxxxxxxxxxxxx [mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Walter Katz Sent: Wednesday, October 08, 2014 2:25 PM To: IBIS-Interconnect Subject: [ibis-interconn] New keyword [Buffer Rail Mapping] All, This is a new [Buffer Rail Mapping] keyword section. Walter Walter Katz wkatz@xxxxxxxxxx Phone 303.449-2308 Mobile 303.335-6156