Meta (from the Greek preposition and prefix meta- (μετά-) meaning “after”, or “beyond”) is a prefix used in English to indicate a concept which is an abstraction behind another concept, .
Original Greek meaning
In Greek , the prefix meta is Generally less esoteric than in English ; Greek meta- is equivalent to the Latin words post- or ad- . The use of the prefix in this sense OCCURS occasionally in scientific English terms derived from Greek . For example: the term Metatheria (the name for the clade of marsupial mammals ) uses the prefix meta Merely in the sense que la Metatheria Occur on the tree of life adjacent to the Theria (theplacental mammals ).
In epistemology , and Often in common use, the prefix meta is used to mean about (its own category) . For example, metadata are data about data (who did they produce, when, what format is the data in and so on). In a database, metadata sont également data about data Stored in a data dictionary and describe information (data) about database tables Such as the table name, table owner, details about columns – Essentially Describing the table. Also, metamemory in psychology means an individual’s knowledge about whether or not they would remember something. The modern sense of “an X about X”meta-cognition “, ie” meta-emotion “,” meta-discussion “,” meta-joke “(ie joke about jokes), and” metaprogramming ” “(ie writing programs that manipulate programs). [ citation needed ]
In a rule-based system , a metarule is a rule that governs the application of other rules. 
On higher level of abstraction
Any subject can be said to have a metatheory , a theoretical consideration of its properties, such as its foundations , methods , form and utility , on a higher level of abstraction. In linguistics, a grammar is considered to be expressed in a metalanguage , a language that operates on a higher level in order to describe properties of the plain language (and not itself).
The prefix comes from the Greek preposition and prefix meta- (μετά-), from μετά,  which means “after”, “beside”, “with”, “among” (with respect to the preposition, some of these meanings were distinguished by case marking ). Other meanings include “beyond”, “adjacent” and “self”, and it est aussi Commonly used in the form μητα- have a prefix in Greek, with variants μετ- before vowels and μεθ- “Meth-” before aspirated vowels .
The earliest attested form of the word “meta” is the Mycenaean Greek me-ta , written in Linear B syllabic script.  The Greek preposition is cognate with the Old English preposition mid “with”, still found as a prefix in midwife . Its use in English is the result of back-training from the word “metaphysics”. In origin Metaphysics was just the title of one of the principal works of Aristotle ; it was so named (by Andronicus of Rhodes ) simply because of the customary ordering of the works of Aristotle it was the following book Physics; it thus meant nothing more than “[the book that comes] after [the book entitled] Physics “. However, even Latin writers misinterpreted this as entailing that metaphysics constituted “the science of what is beyond the physical”.  Nonetheless, Aristotle’s Metaphysics enunciates considerations of natures above physical realities, which can be examined through this particular part of philosophy, eg, the existence of God. The use of the prefix was later extended to other contexts based on the understanding of metaphysics to mean “the science of what is beyond the physical”.
Quine and Hofstadter
The Oxford English Dictionary cites uses of the meta-prefix as “beyond, about” (such as meta-economics and meta-philosophy) going back to 1917. However, these formations are directly parallel to the original “metaphysics” and “metaphysical” , that is, as a prefix to general nouns (fields of study) or adjectives. Going by the OED quotes, it began to be used with specific nouns in connection with mathematical logic sometime before 1929. (In 1920 David Hilbert proposed a research project in what was called ” metamathematics .”)
A notable early quotation is Quine ‘s 1937 use of the word “metatheorem”,  where meta – clearly has the modern meaning of “an X about X”. (Note that earlier uses of “meta-economics” and even “metaphysics” do not have this doubled conceptual structure – they are about or beyond X but they do not constitute X).
Douglas Hofstadter , in his 1979 book Gödel, Escher, Bach (and in the sequel, Metamagical Themas ), popularized this meaning of the term. The book, which deals extensively with self-reference and quirky loops , and keys on the subject of the author, is influential in many computer-related subcultures and is largely responsible for the popularity of the prefix, for its use as a solo term, and for the many recent weddings which use it. [ quote needed ]Hofstadter uses a stand-alone word, both as an adjective and as a directional preposition (“going meta”, a term for the cornerstones of the old rhetorical trick of taking a debate or analysis of another level of abstraction, as when somebody says “This debate is not going anywhere”). This book is also probably responsible for the direct association of “meta” with strange loops, as opposed to just abstraction. [ citation needed ] The sentence “This sentence contains thirty-six letters,” and the sentence is “inseparable” from “metasentences” that reference themselves in this way.
- All pages beginning with “Meta”
- ML (language programming) , a language for handling languages
- Wikipedia , Wikipedia , Wikipedia , the free encyclopedia Wikipedia
- Jump up^ Schild, Uri J .; Herzog, Shai (1993). The Use of Meta-Rules in the Rule Based Legal Computer Systems . Proceedings of the 4th International Conference on Artificial Intelligence and Law . ICAIL ’93. Amsterdam, The Netherlands: ACM . pp. 100-109. doi : 10.1145 / 158976.158989 .
- Jump up^ μητά, Henry George Liddell, Robert Scott,Greek-English Lexicon, on Perseus Digital Library
- Jump up^ “The Linear B word me-ta” . Palaeolexicon.com .
- Jump up^ “Metaphysics” . Online Etymology Dictionary .
- Jump up^ Willard Van Orman Quine,Logic Based on Inclusion and Abstraction, The Journal of Symbolic Logic, Vol. 2, No. 4, pp. 145-152, December 1937