Identifier

Identifiers are a type of data that uniquely identify an object or entity within a given context. They are most commonly used in computer programming to refer to specific items, such as but not limited to data objects, classes, functions, variables, keywords, command names, labels, statements, and other components related to programming languages.

History

It is difficult to determine when the first identifiable identifier was used and created, as identifiers experienced variations in the past. One of the first concepts that could be defined as an identifier was the labelling system, created in the late 1940s. In the 1950s, identifiers were generated for photographs via the editing process to document when a there was a change made while editing. In addition, identifiers were created for tracking information on punched cards for computers.

Uses

Identifiers are used primarily in computer coding to represent unique objects, such as classes, functions, variables, and statements, and are also used in information systems and databases. Most programming languages use a form of naming for identifiers; for example, in C language it is called the identifier format, while the Java programming language uses identifiers known as literals. These unique identifiers are the basis of data validation and integrity as the system can ensure each value is unique with the use of identifiers.

Outside of computer programming, identifiers are also used to link information between other systems. In information security, identifiers are used to verify the identity of a user, allowing them to securely access data or resources.

Performance

Identifiers are an integral part of computer programming and information security, and performance of a system is directly related to their handling. Poorly crafted identifiers can lead to slow running code, incorrect data returns, and security mistakes. Maintenance costs of the system can be significantly increased if well written identifiers are not used during development. Thus, identifiers are an important consideration that should be taken into account when developing code and information systems.

Conclusion

Identifiers are used to uniquely identify an object or entity within a given context. They are most widely used in computer programming and information security. Poorly crafted identifiers can lead to slow running code, incorrect data returns, and security mistakes. Thus, they are an important consideration that should be taken into account when developing code and information systems.