请问如下结构体中的meta是如何使用的?
typedef struct {
char * name;
char * address;
neu_attribute_e attribute;
neu_type_e type;
uint8_t precision;
double decimal;
char * description;
neu_datatag_addr_option_u option;
uint8_t meta[NEU_TAG_META_SIZE];
} neu_datatag_t;