title and caption
-----------------

03 "string" 58 "" "string" 01
05 58 "varname" "Label" 02

styles
------

The first 20 or so lines appear to be present in each file as permutations.

dimensions
----------

last number on each line is the number of directly nested groups
or categories

second-to-last number on first line is the dimension number: 00, i1,
i2, ...

second-to-last number on remaining lines is i-1 for groups, or a
counter from i0 for categories

First line of each dimension:
    03 "Short" 58 "id" "Long" 01      00 0x i2 0y 00 [01|i1] z w
    05 58 "varname" "Label"   [02|03] 00 0x i2 0y 00 [01|i1] z w
where x is 0, 1, or 2
           0 and 1 are common
	   2 only occurs once and may indicate corner text or layering
      y is 0 or 1
      z is 00 or iN and counts up the dimension number from 0 for the
        first dimension
      w is iN and specifies the number of directly nested groups or categories.

data
----

format: dd ww ff 00, e.g. F40.1 is 01 28 05 00
01 - double (01 58 format double)
02 - instance of a variable (02 58 format double "varname" "Variable Label")
03 - just a string (03 "Short Name" 58 "identifier" "Long Name")
05 - variable (05 58 "varname" "Variable Label")