1 Nineteen ISO 8879:1986 character entity sets used by many DTDs:
5 Added Math Symbols: Arrow Relations
6 Added Math Symbols: Binary Operators
7 Added Math Symbols: Delimiters
8 Added Math Symbols: Negated Relations
9 Added Math Symbols: Ordinary
10 Added Math Symbols: Relations, Box and Line Drawing
11 Alternative Greek Symbols
18 Numeric and Special Graphic