How to dump an advanced revelation database?
Advanced Revelation is a multi-valued database based on the original PICK operating system.  You can find information on PICK and it's spin-offs here:

https://en.wikipedia.org/wiki/Pick_operating_system

I've been developing on PICK and like systems for over 35 years, including Advanced Revelation.  Manuals are a little difficult to find online. You may also have some luck finding more information here:

http://www.jes.com