GEN Database Programs and Screens

I am running the following query on GEN. I wanted to see what fields are being used by a certain Program and Screen.

SELECT *
FROM dbo.PGMFLD
WHERE PROGRAMCODE = 'HR11'
AND SCRNBR = 1
AND PRODUCTLINE = 'LAWPROD'

What is the prefix field used for. Is there a list of the defintions of these fields? Let's say I was in the Lawson Portal on Screen HR11.1. I want to know what tables and fields that this form uses, so I can write a report. I am not worried about how to connect back to other tables to get the actual tables used in this form and screen. I know how to do that. What prefix would I use. Do I further constrain on prefix = 'EMP'. If this is correct, then why are the other prefixes evern listed here. Doing a distinct on prefix using the same query gives me the following:



AAX
AJH
APL
BEN
BNB
BNG
BNH
BTE
CCH
CCT
CTC
CUC
DDC
DIP
DPT
EDM
EFD
EMP
EMS
EPC
ETM
GCD
GDT
GIC
GLS
HER
HEU
HRH
HRU
HSL
HSU
INT
ITV
JBC
LTR
MIL
OTD
PA2
PAA
PAB
PAC
PAD
PAH
PAP
PAS
PAT
PBG
PCD
PCO
PCT
PDD
PDH
PEA
PEM
PEP
PEU
PGE
PGS
PJR
PLM
PLN
PMD
PMN
POS
PPC
PPP
PPR
PPV
PQC
PRA
PRC
PRF
PRG
PRH
PRO
PRQ
PRR
PRS
PRX
PSA
PTF
PTS
PW4
PWU
PXL
PYD
PYM
QTD
QTW
REG
RGP
RQC
SGD
SGH
STM
TAP
TAR
TBL
TEM
TEN
TES
TGE
TGR
TLM
TPR
TRD
TSC
TST
TTR
TXG
WSC
WUP