GBKF Reserved IDs

The GBKF format allows to define a "Specification ID", similar to a "sub-extension". This allows readers to identify the top-level specification, to correctly read the file.

For example, we can imagine that there is a chat company that want to reserve the range 2000-2100, and their break-down of top-level specifications is the following:

  • 2000: User data and settings.
  • 2001: Servers data
  • 2002: Rooms data.
  • 2003: Chat messages.
  • etc...

So you are free to reserve a range of specification ID's and use them as you need.

How to reserve a Specification ID

To reserve a value or a range of values, you must write an email to contact@rsm92.fr, and provide as most details as possible:

  • Requestor/Company name/website.
  • Basic explanation of the intended usage.
  • License of the top-level specification; Private, Open-Source, Libre-Software, ...
  • Is the format already in use?
  • Your desired ID's range.

Once the request approved, it will be added the public list.

Public List

  • 0: Means Undefined, it is not possible to reserve.
  • 1 to 9999: Are values reserved to libre-source projects of public interest.
  • 1000-1099: Private format to manage server-client exchanges by CAD-Viewer.com External Link. Reserved on May 10, 2025.
  • 1100 to 4,294,967,295: Are free of use, for both public and private projects.