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.
docm : Microsoft Office Open XML with Macros Enabled
The M of DOCM stands for macro. Macros are programs embedded in Office documents used to automate different tasks. Staring from Word 2007, DOCX documents that contain macros are saved with the DOCM extension.