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.
TCR is a ZVR based eBook file format that is used in some eBook readers. It is used to store a document. Although it is a proprietary file format from Calibre, TCR files can be viewed from several eBook reading software. It has better compression technique than palmDOC.