Variables

DataForm Handicap Ratings Unadjusted (dah)
adh Average.
bdh Best.
mdh Median.
ldh Best of last 2 ratings achieved under the same Code.
mr Master Rating. Calculated from DataForm speed ratings, DataForm handicap ratings, age and exposure, to represent current ability. A plus (+) after the Master Rating indicates either: the horse won with something in hand in either of its last 2 runs OR it was eased or unlucky in running in either of its last 2 runs OR the subsequent performances of horses it raced against in its last 2 runs suggest the MR is under.
emr Estimated Master Rating. The same as MR but calculated from ratings achieved in other race-codes.

DataForm Handicap Ratings Adjusted with WFA and Weight-Carried (DaH)
aDH Average.
bDH Best.
mDH Median.
LDH Best of last 2 Adjusted DataForm Handicap Ratings under the same Code.
MR Master Rating. Calculated from DataForm Speed ratings, DataForm Handicap ratings, age and exposure, to represent current ability. A plus (+) after the Master Ratings indicates either: the horse won with something in hand in either of its last 2 runs OR it was eased or unlucky in running in either of its last 2 runs OR the subsequent performances of horses it raced against in its last 2 runs suggest the MR is under.
eMR Estimated Master Rating. The same as MR but calculated from ratings achieved in other race-codes.

DataForm Speed Ratings Unadjusted (das)
ads Average.
bds Best.
mds Median.
lds Best of last 2.

DataForm Speed Ratings Adjusted with WFA and Weight-Carried (DaS)
aDS Average.
bDS Best.
mDS Median.
LDS Best of last 2.

Private Handicap Ratings Unadjusted (prh)
aph Average.
bph Best.
mph Median.
lph Best of last 2.

Private Handicap Ratings Adjusted with WFA and Weight-Carried (PrH)
aPH Average.
bPH Best.
mPH Median.
LPH Best of last 2.

Private Speed Ratings Unadjusted (prs)
aps Average.
bps Best.
mps Median.

Private Speed Ratings Adjusted with WFA and Weight-Carried (PrS)
aPS Average.
bPS Best.
mPS Median.

Official Handicap (Off)
tdy The official mark the horse runs off in today's race
TDY The official mark the horse runs off in today's race adjusted with WFA and weight-carried
ovl Today's official mark minus last official mark under the same code.
ovw Today's official mark minus last winning official mark under the same code.
ovo Today's official mark minus highest winning official mark under the same code.
DvO The best of the last 2 DaH ratings compared with the official mark the horse runs off in today's race.

Class
aPr Average Prize won. The average of all Prizes won .
bPr Best Prize won. The best of all Prizes won .
mPr Median Prize won. The median of all Prizes won .
Vdw Total WIN prize money divided by the number of WINS.
CLA Efficiency in races of the Same Class (any Code).
CLC Efficiency in races of the Same Class and Code.
CL+ Efficiency in higher Class races (any Code).
CL- Efficiency in lower Class races (any Code).
LAC Efficiency in last 2 races (same Class only) (any Code).
DIC Efficiency in races of the same Distance (+/- 0.5f) and Class (any Code).
GOC Efficiency in races of the same Going and Class (any Code).
Pr1 Value of last race.

Distance
aDI Efficiency in races of the Distance +/- 10%.
DI- Efficiency at shorter Distances.
DIS Efficiency in races of the same Distance (+/- 0.5f) (same Code only).
DI+ Efficiency at longer Distances.
di- Efficiency at shorter Distances (same Code only).
di+ Efficiency at longer Distances (same Code only).

Going
aGO Efficiency on adjacent Goings (eg: if today is G then aGO = efficiency on GF, G and GS).
GO- Efficiency on firmer Goings.
GOI Efficiency in races of the same Going.
GO+ Efficiency on heavier Goings.
go- Efficiency on firmer Goings (same Code only).
go+ Efficiency on heavier Goings (same Code only).

Course
CRS Efficiency at the same Course and Code.
cOR Efficiency at Courses of the same direction of Orbit (LH/RH/Fig8/Straight).
cGL Efficiency in races of the same Code at Courses with a similar General Level (Level/Undulating).
cBE Efficiency in races of the same Code at Courses with similar Bends (Sharp/Easy/Galloping/Straight).
c-R Efficiency in races of the same Code at Courses with a similar length of Run-In (Short/Medium/Long).
c/R Efficiency in races of the same Code at Courses with a similar Level of Run-In (Uphill/Downhill/Level/Undulating).
cIM Efficiency in races of the same Code at Courses with a similar Impedence (Stiff/Easy).
cFE Efficiency in races of the same Code at Courses with similar Fences (Hard only).

General
ALL Efficiency in all races.
LAT Efficiency in last 2 races.
COD Efficiency in races of the same Code (Flat/Hurdle/Chase/AW).
CDG Course/Distance/Going winner. A 'C' means the horse has won at the Course before. A 'D' means the horse has won at the same Distance (+/- 0.5f) before. A 'G' means the horse has won at the same Going before.
Imp Overall Improvement. This is calculated by comparing the best of the horse's last 2 DataForm Handicap Ratings with the Average DataForm Handicap Rating from the first half of its runs. (Eg: if the horse ran 8 times, then the best of its last 2 ratings is compared with the average of its first 4 ratings).
IDS Consistent improvement in DataForm Speed (das) ratings. Compares ratings achieved in races of the same code as the runner's last race. Eg: If the runner's last race was an All Weather race then this variable will represent the number of times the runner's das rating consistently improved in All Weather races (looking back from the runner's last race). A win counts as improvement regardless of the previous rating.
IDH Consistent improvement in DataForm Handicap (dah) ratings. Compares ratings achieved in races of the same code as the runner's last race. Eg: If the runner's last race was an All Weather race then this variable will represent the number of times the runner's dah rating consistently improved in All Weather races (looking back from the runner's last race). A win counts as improvement regardless of the previous rating.

Fitness
DSR Days Since last Run under any code.
DS2 Days Since 2nd last Run under any code.

Trainer
TrA Win Strike-Rate at all courses in the last 12 months.
TrC Win Strike-Rate at the course in the last 5 years.
TRW Win Strike-Rate at all courses in the last USER-DEFINED PERIOD.
TRE Efficiency at all courses in the last USER-DEFINED PERIOD.

Jockey
JoA Win Strike-Rate at all courses in the last 12 months.
JoC Win Strike-Rate at the course in the last 5 years.
JRW Win Strike-Rate at all courses in the last USER-DEFINED PERIOD.
JRE Efficiency at all courses in the last USER-DEFINED PERIOD.
JKH Jockey knows horse (rode horse before).

Draw
DrA Draw advantage (scaled -5 to +5). Compiled from results at the course and distance since 2001. NOTE: For distances with low results samples (where there are fewer than 40 previous results for any occupied* stall) DrA is compiled from results from the next nearest distance (within 20 yards) so long as there are at least 40 previous results for all occupied* stalls. (*By occupied we mean 'occupied in the race being analysed').

Last Run Comments-in-Running
1AO = All out.
1CH = Challenged.
1DR = Driven.
1EZ = Easily.
1EA = Eased.
1EF = Effort.
1EC = Every chance.
1GA = Game.
1HA = Hampered.
1HE = Headway.
1HU = Held up.
1KE = Keen.
1KO = Kept on.
1LE = Led.
1LY = Led early.
1LL = Led late.
1MA = Made all.
1MM = Made most.
1MI = Mistake.
1NC = Not clear run.
1NE = No extra.
1OP = One pace.
1OU = Outpaced.
1PR = Prominent.
1PU = Pushed.
1QU = Quickened.
1RO = Ran on.
1RI = Ridden.
1SO = Stayed on.
1SS = Started slowly.
1WE = Weakened.

Starting Prices
ISP Industry SP.
WBSP Betfair win market SP.
PBSP Betfair place market SP.
FSP Forecast Starting Price provided with racecards.
PSP PRO SP. Generated by DataForm's Ai scripts.

Other Variables
A Jockey's weight allowance (claim).
Age The horse's age.
Wgt Weight carried.
PR Number of previous runs under any code.
PRC Number of previous runs under the same code.
LPR Smallest number of previous runs under any code of all runners.
LPRC Smallest number of previous runs under the same code of all runners.

SOME VARIABLE NAMES ARE CHANGED FOR EXPORTS..
DI+ = DILAC
DI- = DIQAC
di+ = diLSC
di- = diQSC
GO+ = GOHAC
GO- = GOFAC
go+ = goHSC
go- = goFSC
CL+ = CLP
CL- = CLM
ads = adsu
bds = bdsu
mds = mdsu
adh = adhu
bdh = bdhu
mdh = mdhu
ldh = ldhu
mr = mru
emr = emru
aph = aphu
bph = bphu
mph = mphu
lph = lphu
aps = apsu
bps = bpsu
mps = mpsu