In fact, table manners are all the more potent an identifier for being completely arbitrary.
This attitude is irrelevant in a context in which best is an identifier of wares, not of dynamic knowledge.
This night, as you must have heard, I received strict orders to act as identifier of your son's head.
The label now bears in handwriting the name of P. amplus pergracilis and is followed by Benson's initials as the identifier.
In this process, the human being became a working being, and work an identifier of the species.
My sarcastic friends are very explicit about this hat serving as my identifier.
1640s, "regard as the same," from French identifier, from identité (see identity). Sense of "recognize" first recorded 1769. Meaning "make one (with), associate (oneself)" is from 1780. Sense of "serve as means of identification" is attested by 1886. Related: Identified; identifying.
Each different type of entity may have a different range of valid identifiers or "name space". For example, an identifier in C is a series of one or more letters, digits and underscores that does not begin with a digit. An identifier has a type, e.g. integer variable, hash, variant and a scope, e.g. block, global.