The atomic type specifiers are those defined names listed in Figure~4–2. Such dictionary entries are of kind "Class," "Condition Type," "System Class," or "Type." A description of how to interpret a symbol naming one of these types or classes as an atomic type specifier is found in the "Description" section of such dictionary entries.
The compound type specifiers are those defined names listed in Figure~4–3. Such dictionary entries are of kind "Class," "System Class," "Type," or "Type Specifier." A description of how to interpret as a compound type specifier a list whose car is such a symbol is found in the "Compound Type Specifier Kind," "Compound Type Specifier Syntax," "Compound Type Specifier Arguments," and "Compound Type Specifier Description" sections of such dictionary entries.