What is REX? What Opens a REX? File Format List from WhatIs.com

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File Extensions: REX File Format

File Extension

REX File Format

Local database file (4th Dimension)

REX is a file extension for a local database file used with 4^th Dimension Software. REX files contain a database used cross-platform, web-enabled solutions. REX files can be opened with 4^th Dimension software, created by 4D Inc.

The REX file extension is also associated with Oracle report definition files and REXX source code files.

Learn more about .REX files:

Visit the 4D web page.

Read the Database FAQ at ITKnowledgeExchange.com.

This was last updated in: August 2010

Editorial Director: Margaret Rouse

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