Charles III no relation bibliographic control
Examples
Diverse names describe the same subject
Sometimes within a catalog, there are diverse names or spellings for only one person or subject.  This variation may cause researchers to overlook relevant information. Authority control is used by catalogers to collocate materials that logically belong together but that present themselves differently. Records are used to establish uniform titles that collocate all versions of a given work under one unique heading even when such versions are issued under different titles. With authority control, one unique preferred name represents all variations and will include different variations, spellings and misspellings, uppercase versus lowercase variants, differing dates, and so forth. For example, in Wikipedia, the first wife of Charles III is described by an article Diana, Princess of Wales as well as numerous other descriptors, e.g. Princess Diana, but both Princess Diana and Diana, Princess of Wales describe the same person; an authority record would choose one title as the preferred one for consistency. In an online library catalog, various entries might look like the following:
Diana. (1)
Diana, Princess of Wales. (1)
Diana, Princess of Wales, 1961–1997. (13)
Diana, Princess of Wales 1961–1997. (1)
Diana, Princess of Wales, 1961–1997. (2)
DIANA, PRINCESS OF WALES, 1961–1997. (1)These terms describe the same person. Accordingly, authority control reduces these entries to one unique entry or officially authorized heading, sometimes termed an access point: Diana, Princess of Wales, 1961–1997.
Generally, there are different authority file headings and identifiers used by different libraries in different countries, possibly inviting confusion, but there are different approaches internationally to try to lessen the confusion. One international effort to prevent such confusion is the Virtual International Authority File which is a collaborative attempt to provide a single heading for a particular subject. It is a way to standardize information from different authority files around the world such as the Integrated Authority File (GND) maintained and used cooperatively by many libraries in German-speaking countries and the United States Library of Congress. The idea is to create a single worldwide virtual authority file. For example, the ID for Princess Diana in the GND is 118525123 (preferred name: Diana < Wales, Prinzessin>) while the United States Library of Congress uses the term Diana, Princess of Wales, 1961–1997;  other authority files have other choices. The Virtual International Authority File choice for all of these variations is VIAF ID: 107032638 — that is, a common number representing all of these variations.The English Wikipedia prefers the term "Diana, Princess of Wales", but at the bottom of the article about her, there are links to various international cataloging efforts for reference purposes.Same name describes two different subjects
Sometimes two different authors have been published under the same name. This can happen if there is a title which is identical to another title or to a collective uniform title. This, too, can cause confusion. Different authors can be distinguished correctly from each other by, for example, adding a middle initial to one of the names; in addition, other information can be added to one entry to clarify the subject, such as birth year, death year, range of active years such as 1918–1965 when the person flourished, or a brief descriptive epithet. When catalogers come across different subjects with similar or identical headings, they can disambiguate them using authority control.
no relation