Hello @LewG007,
 
I think the information is there, although I agree you need to trace it back a little bit.
 
On the SAS Environment Manager Users Guide, you can find information of the tables, their meaining, and the columns, although not much information at the column level:
 
https://support.sas.com/documentation/cdl/en/evug/69029/PDF/default/evug.pdf
http://documentation.sas.com/?cdcId=evcdc&cdcVersion=2.5_M1&docsetId=evug&docsetTarget=n1fg7s4wpd6d9...
 
In other hand, you have documentation on all the reports generated by the ACM, APM, Audit, Datamart, Events/Alerts, etc, etc:
https://support.sas.com/rnd/emi/SASEnvMgr/EVSAF/Report_Center_Report_Listings.pdf
 
On the reports for the Datamart, I can see:
- Data Mart ACM Listing: Data Mart ACM Listing of Tables, Attributes and Variables
 
- Data Mart Artifact Listing:  Data Mart Artifact Listing of Tables, Attributes and Variables
 
- Data Mart Proc Contents Full Listing: Data Mart Contents Listing
 
 
Those reports should be able to provide you with more information.
 
Please let us know if this information helped you.
 
Best regards,
Juan