The document revision history component gives you a tool to view the revision history for any document.

If you select a single revision in the Revision History list then that revision is compared with your current local working copy.

If you select two revisions (holding down the Ctrl key) then those two revisions will be compared.

Right-click and select Difference from the context menu.

Because there is such a huge variety of document and file types we do not include a file comparison program. You must download and/or purchase third-party comparison programs to do the specific job that you require.

Adding A Difference Program

In this example we will show you how to 'plug in' the freeware file comparison program called ExamDiff. 

All credit to the folks at prestoSoft for an excellent piece of work.

Download and install your chosen difference programs. Yes, plural, you can associate different file name extensions with different comparison programs.

Start the Configuration Program , Database Tab, Diff Programs button.

This will present a simple tool that we provide to edit settings that are stored in the database :

Click on the + button to add a new record. A new record is created in the table.

Click on the new line created to select this record and then click in the prog column of that line to edit the contents there. Enter the full path to the EmxamDiff program. In this example enter :

C:/Program Files/ExamDiff/ExamDiff.exe   Use forward slashes!

In the name column enter ExamDiff.

If you want this particular difference program to be used only for a specific document type enter the filename extension into the ext column. Leave the ext column empty for the diff program to be used for all document types. In this example we only want ExamDiff to be used for text documents.

Leave the params column as {file1} {file2}.

You can add as many programs as you require for different file and document types. The system will choose which program to use based upon the file name extension.