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Reference

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In logic, a reference is a specific relationship between two objects. One object acts as a means to connect to or link to another object. The first object is said to refer to the second object. We call this first object a name. The second object, which is the target of the link, is called the referent.

Ogden semiotic triangle
Ogden semiotic triangle

A name is often a phrase, an expression, or a symbolic representation. The referent can be almost anything. It might be a material object, a person, or an event. It could also be an activity or an abstract concept.

References can take many different forms in our world. They can be a thought or a sensory perception. This includes things we hear through onomatopoeia or things we see in text. A reference might even be an emotional state or a relationship with others. It can involve spacetime coordinates, alpha-numeric symbols, or even an energy projection. In certain fields, like cryptography, methods are used to intentionally hide a reference from observers. This ensures that only specific people can see the connection.

In the field of semantics, researchers study how nouns and pronouns relate to objects. For example, the word "John" refers to a specific person named John. The word "it" refers to an object that was mentioned previously. This relationship where a word points to an object is called denotation. The opposite process is called exemplification. This occurs when an object exemplifies what a word denotes. In syntactic analysis, if a word refers to a word that came before it, that earlier word is called the antecedent.

Philosophers have noted that reference is not the same as meaning. The thinker Gottlob Frege explored this distinction. He used the example of two ancient Greek names for the planet Venus. One name was "Hesperus," which referred to the evening star. The other name was "Phosphorus," which referred to the morning star. Both names refer to the same object, Venus. However, knowing that "Hesperus" is "Phosphorus" provides new astronomical information. This led Frege to separate the "sense" of a word from its "reference."

The word reference has a long history in the English language. It is derived from Middle English and Middle French. Its roots go back to the Latin words "re-" and "ferre." The prefix "re-" means "back," and "ferre" means "to bear." Therefore, the word literally means "to carry back."

Ogden semiotic triangle
Ogden semiotic triangle

This root is found in many other words. These include refer, referee, referential, referent, and referendum. The verb "refer" can mean to link to something or to consult a source.

Different professional fields use the concept of reference in unique ways. In computer science, references are data types. They refer to an object located elsewhere in a computer's memory. This allows a program to access a specific data item directly. In library science, references help identify specific works. Books use an ISBN, while journal articles often use a Digital object identifier, or DOI. On the internet, information is often found using a Uniform Resource Identifier, or URI.

In academic scholarship, references are vital for honest communication. A bibliographical reference is information provided in a footnote or bibliography. It usually includes the author's name, the title, and the year of publication. These references allow readers to check the validity of a text. They also help readers learn more about a subject. Using references is essential to avoid plagiarism. Plagiarism is the act of copying material without proper permission or credit. This can even lead to legal proceedings for copyright infringement.

References also appear in law, psychology, and the arts. In patent law, a reference is a document used to show existing knowledge. This helps determine if an invention is truly new. In psychology, self-reference helps individuals identify their own mental states. According to Perceptual Control Theory, all behavior is oriented around controlling quantities relative to specific reference conditions. Finally, in art, a reference is an item used as a base for a work. This might be a photograph, a memory, or a musical sample used in a new composition.

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