Proposed resolution:

Change the first paragraph of "3 Decimal floating-point types" as follows:

This Technical Report introduces three decimal floating-point types, named decimal32, decimal64, and decimal128. The set of values of type decimal32 is a subset of the set of values of type decimal64; the set of values of the type decimal64 is a subset of the set of values of the type decimal128. Support for decimal128 is optional. These types supplement the Standard C++ types float, double, and long double, which are collectively described as the basic floating types.

The document uses the term "generic floating types," but defines it nowhere.