STL has been used as the 'de facto' standard for over 20 years. New file format called AMF was developed in order to overcome numbers of limitations of STL. The author reports his brief interpretations of AMF, applications using the current AMF, and ideas of extensions for next version AMF.
Hiroya Tanaka, "New File Format for 3D Printing, its extensions and applications" in Proc. IS&T Int'l Conf. on Digital Printing Technologies and Digital Fabrication (NIP31), 2015, pp 3 - 6, https://doi.org/10.2352/ISSN.2169-4451.2015.31.1.art00003_1