identifiers

noun

1. 1.Someone who identifies; a person who establishes the identity of.
2. 2.Something that identifies or uniquely points to something or someone else.
3. 3.A guidebook that helps determine the specific class of an object (such as a mushroom, herb, fish, bird, drug, or mineral), or its individual identity (such as that of a star).
4. 4.(operating systems) A formal name used in source code to refer to a variable, function, procedure, package, etc. or in an operating system to refer to a process, user, group, etc.
5. 5.A code that distinguishes a particular element from all other elements in a document.