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.
PDB is an eBook or database format used in the Palm OS platform. PDB files support royalty free eBooks because it does not provide Digital Rights Management (DRM). PDB supports the basic eBooks with basic format. It is used in Palm devices.