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 [mailto:midrange-l-bounces@xxxxxxxxxxxx] 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? -- This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/midrange-l or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/midrange-l.