a technical system of symbols used to represent special things; notational system
a comment or instruction (usually added); note, annotation
his notes were appended at the end of the article
he added a short notation to the address on the envelope
the activity of representing something by a special system of marks or characters
Microsoft Computer Dictionary
n. In programming, the set of symbols and formats used to describe the elements of programming, mathematics, or a scientific field. A language’s syntax is defined in part by notation. See also syntax.