Information:  - ISO 639 is a set of standards by the International Organization for Standardization that is concerned with representation of names for language and language groups.  - ISO 639 - 2:1998 , Codes for the representation of names of languages -- Part 2 : Alpha - 3 code , is the second part of the ISO 639 standard , which lists codes for the representation of the names of languages . The three - letter codes given for each language in this part of the standard are referred to as `` Alpha - 3 '' codes . There are 464 entries in the list of ISO 639 - 2 codes . The US Library of Congress is the registration authority for ISO 639 - 2 ( referred to as ISO 639 - 2/RA ) . As registration authority , the LOC receives and reviews proposed changes ; they also have representation on the ISO 639 - RA Joint Advisory Committee responsible for maintaining the ISO 639 code tables .  - ISO 639-1:2002, "Codes for the representation of names of languages  Part 1: Alpha-2 code", is the first part of the ISO 639 series of international standards for language codes. Part 1 covers the registration of two-letter codes. There are 184 two-letter codes registered as of October 2015. The registered codes cover the world's major languages.  - The International Organization for Standardization (ISO) is an international standard-setting body composed of representatives from various national standards organizations.  - ISO 639 is a set of international standards that lists short codes for language names. The following is a complete list of three-letter codes defined in part two (ISO 639-2) of the standard, including the corresponding two-letter (ISO 639-1) codes where they exist.  - Language is the ability to acquire and use complex systems of communication, particularly the human ability to do so, and a language is any specific example of such a system. The scientific study of language is called linguistics. Questions concerning the philosophy of language, such as whether words can represent experience, have been debated since Gorgias and Plato in Ancient Greece. Thinkers such as Rousseau have argued that language originated from emotions while others like Kant have held that it originated from rational and logical thought. 20th-century philosophers such as Wittgenstein argued that philosophy is really the study of language. Major figures in linguistics include Ferdinand de Saussure and Noam Chomsky.    What entity does 'iso 639-2' has the relation 'instance of' with?
The answer to this question is:
international standard