Extend the compound document facet for compound document file types

• I need to be able to define a generic compound format, as well as apply a specific format to my compound with appropriate restrictions.
• These are the main categories currently identified: 

1. 1. Material files: xtex, u3m are the main material format to structure the compound.
   2. Complex Layouts: Page Layouts: native layouts (.indd or .ai), pdf for preview (if needed), n-ancillary files (txt, pdf, json), subfolder with n-linked component files (images, illustrator, pdfs...)
   3. Product Designs: main 3D design file (obj, clo, zproj. lxo, xtex etc.), glb for preview, image for thumb (jpg, png), n-ancillary files (any formats),  subfolder with n-texture files (image formats)

For later: 

1. Complex Video: Video Projects: native Premiere project (.proj) or Avid project (.avp, .avs), preview (mp4 or similar), n-ancillary files,  subfolder with n-components (video, audio, images or graphics formats).