Quartz composer programming language

Introduction to Quartz Composer programming language:

Quartz Composer is a node-based visual programming language which provide as part of the Xcode development environment for processing and rendering graphical data. This language uses OpenGL, Core Video, JavaScript and other technologies to build an API and a developer tool around a simple visual programming paradigm.

Quartz composer Programming code

Feature of Quartz Composer programming language:

Hidden option
Native datatypes
Composition

References:
http://www.pearsoned.co.uk/bookshop/detail.asp?item=100000000305589