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   ► KBDesktop Data...Paradox & Ob...Installation...   Print This     
  From the April 2015 Issue of Prestwood eMag
Paradox Installation, Setup, & BDE:
ObjectPAL File Extensions
Posted 11 years ago on 10/29/2008 and updated 1/28/2009
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Languages Focus: File Extensions

Common or primary file extensions used (not a complete list, just the basics).

ObjectPAL File Extensions

Paradox for Windows has two primary file types: source files and delivered files:

Source Files
Source files in Paradox are binary but can can be opened in later versions of Paradox and even in earlier versions if you don't use any new features.

  • .FSL = Form
  • .RSL = Report
  • .SSL = Script
  • .LSL = Library

Since Paradox source files do not compile to an EXE, Paradox developers tend to use a startup form or script to start the application.

Delivered Files

Can only be opened in the major version of Paradox they were compiled in (7, 8, 9, 10, 11, etc).

  • .FDL = Form
  • .RDL = Report
  • .SDL = Script
  • .LDL = Library


For querires Paradox offers with Query By Example (QBE) or Structured Queary Language (SQL). You can save and execute these queries.

  • .QBE = Query By Example
  • .SQL = Structured Query Language

More Info

KB Post:  Paradox Table Specifications


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Code Contributed By Mike Prestwood:

Mike Prestwood is a drummer, an author, and creator of the PrestwoodBoards online community. He is the President & CEO of Prestwood IT Solutions. Prestwood IT provides Coding, Website, and Computer Tech services. Mike has authored 6 computer books and over 1,200 articles. As a drummer, he maintains play-drums.com and has authored 3 drum books. If you have a project you wish to discuss with Mike, you can send him a private message through his PrestwoodBoards home page or call him 9AM to 4PM PST at 916-726-5675 x205.

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Linked Certification Question(s)

The following are practice certification questions with answers highlighted. These questions were prepared by Mike Prestwood and are intended to stress an important aspect of this KB post. All our practice questions are intended to prepare you generally for passing any certification test as well as prepare you for professional work.


1 Beginner Level Question

Question #1: Multiple Choice

A form has what extension?


.FSL for the delivered form, .FDL for the source code.


.FS for the source code, .FD for delivered form.


.FSL is the only extension for a form.


.FDL is the only extension for a form.


.FSL for the source code, .FDL for delivered form.

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