I would have to say a logical file is a data file built over a physical
file.
The other would be a combined or joined logical file - a combined
logical (over 2 physical files with the same data fields) to produce a
data file - or - a join logical file joins 2 or more physical files
together to form a data file. 

It either of these cases you can have the logical files create a file
with all of the records or just a few records in it (by selecting or
omitting data).

I hope this helps?

Jim


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
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Sent: Wednesday, June 22, 2005 2:36 PM
To: Midrange Systems Technical Discussion (E-mail)
Subject: two types of logical

What are the two types of logical?

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