Integer keywords are new in CSE HTML Validator v10 and represent certain integer values. Like function names and variables, these keywords are also case-sensitive. These keywords provide better code readability.

See also: Validator Engine Integer Keywords Validator Engine String Keywords

f or false - represents 0; f abbreviation new v10.0210

isDestructiveFunctionsEnabled - represents 1 if potentially destructive functions (like writeFile()) have been enabled, else 0 (New v14.9910)

t or true - represents 1; t abbreviation new v10.0210