You're reading the documentation for an older, but still supported version (GL013300).
For information on the latest version, please have a look at GL013301.

PARITY_CHECK

This is an enumerated constant for parity check during serial communication, and is defined as follows.

Rank	Constant Name	Description
0	PARITY_CHECK_NONE	None check
1	PARITY_CHECK_EVEN	Even check
2	PARITY_CHECK_ODD	Odd check

Defined in: DRFC.h

typedef enum {
    PARITY_CHECK_NONE = 0,
    PARITY_CHECK_EVEN,
    PARITY_CHECK_ODD
} PARITY_CHECK;