https://github.com/rapid7/ruby_smb/blob/master/lib/ruby_smb/fscc/file_information/file_name_information.rb#L5 contains a link to https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-fscc/cb30e415-54c5-4483-a346-822ea90e1e89 however it seems like MS removed the definition of the fields here so the only way to review this information now is to download the specs file from https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-fscc/efbfe127-73ad-4140-9967-ec6500e66d5e. It may be worthwhile considering if we want to update the link accordingly.