A 3D model represents some kind of 3D content, which may have encodings in one or more MediaObjects. Many 3D formats are available (e.g. see Wikipedia); specific encoding formats can be represented using the encodingFormat property applied to the relevant MediaObject. For the case of a single file published after Zip compression, the convention of appending '+zip' to the encodingFormat can be used. Geospatial, AR/VR, artistic/animation, gaming, engineering and scientific content can all be represented using 3DModel.