This object must be in every file used or created by the gEDA/gaf tools.
The format of the first version field is YYYYMMDD.
The version number is not an arbitrary timestamp. Do not make up a
version number and expect the tools to behave properly.
The "version of gEDA/gaf that wrote this file" was used in all versions of gEDA/gaf up to 20030921 as the file formats version. This field should no longer be used to determine the file format. It is used for information purposes only now.
Starting at and after gEDA/gaf version 20031004, the fileformat_version field is used to determine the file format version. All file format code should key off of this field.
fileformat_version increases when the file format changes.
The starting point for fileformat_version is 1.
fileformat_version is just an integer with no minor number.