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.
HTML is a markup language that is used to create web pages. Web browsers can parse the HTML file. This file format use tags (e.g ) to build web contents. It can embed texts, image, heading, tables etc using the tags. Other markup languages like PHP, CSS etc can be used with html tags.