ScreenMan Form: Root Type Property
This can be either INDEX FILE or WHOLE
FILE. If we're defining a WHOLE FILE index, the fields in the index are defined
in a subfile, but the index itself physically resides at a higher level. In our
case, the fields in the index will come from the EMAIL multiple, but the index
will reside at the top level of the file. This enables us to lookup entries in
the ZZINDIVIDUAL file given an email address.
If we're not defining a
whole-file index, the Root Type is INDEX FILE and File and Root File are equal.
The index resides at the same file level as the fields in the index. This
enables us to look up entries in the EMAIL multiple for a particular
ZZINDIVIDUAL file entry.