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The QDF file contains all the information about the entries (questions) in your project.

QDF files are UTF-8 encoded with BOM.

The layout of a QDF file can been found at https://netmr.scot/docs/QDF Layout.pdf.

Unicode QDF

If a QDF file is Unicode this is shown in the main window title.

Editing a project

A QDF file should be edited with the Companion, see User Guide, Project definition.

QDF files can also be modified outside Companion, by using a line editor, word-processor or the Windows WordPad.   We recommend you take a back-up copy of a master file before you alter it in this way.  You should only attempt to do this if you know the layout of the file.

Copying a QDF

To make a copy of a QDF, open it and use [File] [Save as].

TIP: if you make a copy of a project with data entered, the data locations will be frozen, see the Data location settings in the User Guide, Starting a project, Project global settings.

You can copy and paste entries from one project to another.