PCB CAD Interfaces - Extract Centroid and Component Shapes

We are looking to enhance one of our products by providing IMPORT capability for as many PCB CAD packages as possible. We need to read / open Printed Circuit Board CAD / Design Files. We would be looking for a solution to provide an interface which will read from many of these formats and OUTPUT a standard file format. This OUTPUT format is flexible can be in XML, TXT, etc. Providing it delivers the following: CENTROID DATA - Component Reference, Xpos, Ypos, Rotation, Device Shape DEVICE SHAPE / PATTERN - some format to describe how to draw the shape outline (e.g. a series of points, rectangles or arcs). Feel free to ask any questions or make any suggestions. The full spec can be detailed directly with interested parties. Regards Dave