A string that specifies a unique object within the DOI system.
NOTE 1: Names consist of characters in a sequence specified by the DOI syntax.
NOTE 2: The terms “identifier” and “number” are sometimes but not always used in the same sense and are to be avoided where ambiguity can arise. The unqualified use of “DOI” alone can also be ambiguous. Therefore “DOI” is always used in conjunction with a specific noun (e.g. DOI name, DOI system) unless the meaning is sufficiently clear from an earlier mention or the specific context.