The format of FIG has evolved over time, supporting more features in each version. These versions are listed below. Unless otherwise indicated, these have been taken from the Xfig distribution.

  • Version 1: 1.3, 1.4, (1.5, 1.6 from fig 1.6 distribution)
    Version 1.3 is the most primitive version, and does not include a "magic number" to identify itself. Version 1.4 was the first to use an identifying mark. Versions 1.5 and 1.6 come from fig 1.6, which appears to be outside the regular evolutionary path of fig/xfig.
  • Version 2: 2.0, 2.1, (2.1 from fig 2.1 distribution)
    Version 2 introduced grey scale in 2.0, and colour in 2.1.
  • Version 3: 3.0, 3.1, 3.2
    Version 3 changed the way that text strings are terminated (i.e. the control-A at the end of a text string was replaced by the text string '\001'), and the default resolution was increased to 1200 pixels per inch from 80 pixels per inch. A new form of splines (X-splines) was introduced in FIG 3.2.

Note: As of XFig 3.2.3, it was noted that there was an error in the description of the Compound object in all formats. (The corners used to delimit the compound object were described as upper right and lower left, when in fact they were upper left and lower right.) This has been fixed in the descriptions above.

This page is part of the XFig, FIG and associated software site.