The purpose of these standards is to provide a method of transferring process or continuous tone colour images, coloured line art, and monochrome images destined for print using the four colour printing process. These images can originate from a wide variety of sources, and may be transferred at any point in the production process. Therefore, this specification does not attempt to specify the final printed result, but to define the components of the image (often referred to as a "bag of pixels") and its current parameters, such as size, resolution, colour saturation, etc. This does not imply that these parameters will not be changed prior to the printing process.