olemus
ISO/IEC 10967-1:
konstantset värtust tähistav süntaktiline üksus
= single syntactic entity denoting a constant value

ISO/IEC 19788-1:
väärtust esitav string
= string representing a value

ISO/IEC 2382:
lexical token that, from a syntactic point of view, stands for itself
Note. Example: The names JAN, FEB, MAR ... in the following definition of a data type are literals. MonthType is (JAN, FEB, MAR, APR, MAY, JUN, JUL, AUG, SEP, OCT, NOV, DEC); Month : MonthType; ..... Month := APR;

ülevaateid
https://en.wikipedia.org/wiki/Literal_(computer_programming)