X12: Problem with '>'

[adrianschlatter]

I'm a big fan of datamatrix-svg, which is why I have been looking at it closely. And I believe I have found an issue with X12-encoding. Encoding messages including '>' often fails (but not always):

toText('A>', [/* X12*/ 238, 12, 8, 0,13, 9, 13, 31, 8, 0, 32, 9, 29, 41, 8, 0,42, 9, 41,47, 8, 0,  57, 9, 44, 64, 8, 0, 90, 9, 51, 255, 8, 0])
=> []

Other examples:

• '>' => [238, 254, 63]
• 'A>' => []
• 'AB>' => []
• 'ABC>' => [238, 89, 233, 254, 63]
• 'ABCD' => []

I expect that all of these message encode to X12 without failure (failure = []) because 'ABCD>' all are valid X12 chars (source: Wikipedia).