IBM ISERIES SC41-5210-04 - Manual (Page 195)

E means DBCS-either
G means DBCS-graphic
L means Date
T means Time
Z means Timestamp
v The Null column shows whether the field is null capable (Y) or not (blank).
v The Data Type column shows the data type for each field.
v The Text column shows the comment (if it exists) for each field. If the field is for a summary function,
the text shown is the field name (without any added numbers) followed by the type of summary function.
v The CCSID column (if shown) appears when multiple CCSIDs are represented and shows the CCSID
for each field.
Chapter 16. Working with Query for iSeries query definitions 183