Hi Ralph,
You are right that the "composite dictionary" is not mentioned in the Help File. The Release note mentions the following:
? A composite table ?Adagio {Composite Tables 6.8B}? is installed with this version of GridView. This table can be used to define views that incorporate fields from related tables. For example, there is a table (SR Trans w Cust, Items) that was defined using the Sales Analysis transactions file with fields from the A/R Customer and I/C Item master. This would make it possible to define a Sales Report that included the Customer Name and Item Description.
? Added 3 new views to illustrate use of composite tables: AR Transactions with Customer Name.gv, GL Posted Transactions w Account Description.gv, and AP Transactions with Vendor Name.gv.
I suppose our thinking was that it was "just another table" and we did not give it the press that it deserves.