Provide the ability to reference in base files to automatically update to reflect new designs

This is more for CorelDraw, and would be really useful for architectural and landscape architectural practices, that draw in an external CAD program and then colour in Coreldraw. Designs change frequently and need to be re-coloured entirely or in part. It would be really useful if the CAD file (.dwg) or even a PDF could be dynamically linked so that coulouring could be automated to update to design changes.