This is a vector imaging format used in the CorelDRAW editor. It has a template that can be applied for other designs, including styles, grid parameters, page layout and other parameters. The CDT template allows for the creation of several images in one style without changing the settings in manual mode.
PS (post script) is file format that can be both vector image and document file. It can contain vector images and text at the same time. PS file holds an instruction about how to print. As it supports both text and images so it can instruct printers how to print the file. PS files are later improved as PDF format.