Hello RDS,
Unfortunately no such thing exist.
The closest match is a book called "Concorde XAL in Case" published by Damgaard Data in 1995.
The book is in Danish, relates to DKDK XAL installations (Danish UI and Danish database definition), exist only in print, and is not available anymore.
All in all not very encouraging.
Please keep in mind: XAL 3.7 is the kernel version, the last XAL application version was XAL 3.5 SP5.
Best Regards
Henrik Hansen [MSFT]
Thank you so much for your quick response. Is it possible to get a data dictionary/ERD for XAL 3.5 SP5?
No the "Concorde XAL in Case" book was the only thing ever produced, and it was based on XAL 2.50 in 1995.