You can create or modify generation elements related with
the Database or the description lines of a Block depending on whether
the -GG Lines section is one of the Database
Block' editor's or one of the Block's description line.
About this task
The definition and description lines of a Database Block
provide all the logical information the System needs to generate the
source program of the Block. The physical information must be indicated
on the -GG lines associated with the definition of a Block and on
the -GG lines associated with a description line to modify it. You
can modify or create generation lines in the following table which
is available in the
-GG Lines section from the
-G Lines tab of a Database block's editor or from
the
-DH Lines, or
-DR Lines or
-DC Lines tab of a Database block:

Lines identified by
the 'VIRT' and 'GUID' notation in the From field of the table correspond to virtual lines and
and are generated automatically and cannot be modified. You must create
other lines from these lines to add modifications to the generation
data so that they are recognized upon generation.