Technically, Orbitvu presentation is a folder that contains image files (for 2D / 360° / 3D content) and some XML configuration files. Its structure is like:
presentationX/ images/ a_0_0_1000_0_0.jpg a_0_0_1000_0_1.jpg a_0_0_1000_1_0.jpg a_0_0_1000_1_1.jpg (...) images2d/ some_image.jpeg config.xml content2.xml meta.xml
Orbitvu presentation structure is optimised for the Web Browser environment. Specifically, image files for 360° presentation are cut into small tiles in order to make Orbitvu presentation loading as efficient as possible.