20 Library introduction [library]

20.4 Method of description (Informative) [description]

20.4.1 Structure of each clause [structure]

20.4.1.2 Summary [structure.summary]

The Summary provides a synopsis of the category, and introduces the first-level subclauses.
Each subclause also provides a summary, listing the headers specified in the subclause and the library entities provided in each header.
The contents of the summary and the detailed specifications include: