.HSF File Extension

File created in the HOOPS Stream Format (HSF), a CAD publishing format developed by Tech Soft 3D for visualization; supported via plug-in or as a native publishing format by several CAD applications, including SolidWorks and CATIA v5.

OpenHSF has largely been replaced by Adobe's 3D PDF technology, which allows 3D visualization data to be embedded into .PDF documents. The OpenHSF Initiative promoted the HOOPS Stream Format until the PDF visualization technology became available.