This is a format used for storing clipart images for working with CorelDRAW vector imaging. It’s used for entering separate, prepared graphical elements into a vector graphics design. It’s used as a blank template and is distributed in the form of millions of prepared cliparts which can compliment your own design.
Since 2007, Microsoft began to use a file format docx, which is created by using the Office Open XML. The format is a zip-file containing the text in the form of XML, graphics and other data that can be translated into a sequence of bits using patent-protected binary formats. At first it was assumed that this format will replace the doc, but both formats are still used today.