Meta' language

Meta’ is a Southern Bantoid language of Cameroon. The Moghamo variety is perhaps divergent enough to be considered a separate language. Ngamambo is 88% similar lexically to Meta’, and often is considered separate.

References

Metalanguage

Broadly, any metalanguage is language or symbols used when language itself is being discussed or examined. In logic and linguistics, a metalanguage is a language used to make statements about statements in another language (the object language). Expressions in a metalanguage are often distinguished from those in an object language by the use of italics, quotation marks, or writing on a separate line.

Types of metalanguage

There is a variety of recognized metalanguages, including embedded, ordered, and nested (or, hierarchical).

Embedded metalanguage

An embedded metalanguage is a language formally, naturally and firmly fixed in an object language. This idea is found in Douglas Hofstadter's book, Gödel, Escher, Bach, in a discussion of the relationship between formal languages and number theory: "... it is in the nature of any formalization of number theory that its metalanguage is embedded within it." It occurs in natural, or informal, languages, as well—such as in English, where words such as noun, verb, or even word describe features and concepts pertaining to the English language itself.

QML

QML (Qt Meta Language or Qt Modeling Language) is a user interface markup language. It is a JSON-like declarative language for designing user interface–centric applications. Inline JavaScript code handles imperative aspects. It is part of Qt Quick, the UI creation kit developed by Nokia within the Qt framework. QML is mainly used for mobile applications where touch input, fluid animations (60 FPS) and user experience are crucial. QML documents describe an object tree of elements. QML elements shipped with Qt are a sophisticated set of building blocks, graphical (e.g., rectangle, image) and behavioral (e.g., state, transition, animation). These elements can be combined to build components ranging in complexity from simple buttons and sliders, to complete internet-enabled programs.

QML elements can be augmented by standard JavaScript both inline and via included .js files. Elements can also be seamlessly integrated and extended by C++ components using the Qt framework.

QML is the language; its JavaScript runtime is the V4 engine and Qt Quick is the scenegraph-based UI framework. These are all part of the Qt Declarative module, but the technology is no longer called Qt Declarative.