Going forward it is expected that ISO 13399 and GTC will converge so that ISO 13399 will contain all data elements needed for cutting tool data interchange.
While the four sponsoring companies further develop GTC to refine the format, the NTB distributes the development outcomes on this website. On the Download site you find the GTC package specification with links to different file examples as well as the GTC class hierarchy. This hierarchy is shown the way it is defined in the form of a product data excel file. However, this format will change in the near future.