The 2,0 offers an additional help for the available number formats and a separate unit input element.

1. As the new renderer code already use an additional left or right unit select element, we can easily maintain the separate unit text input.
2. The help element could be offer as additional choices as just setting an option on the edit form is easier than writing all the available formats.
3. The actual renderer use a select element to render multiple choice unit option.
   This cannot easily render units with exponents and complex structure.
   The 2,0 simple input text element allows some HTML formatting as <sub> and <sup>
   • We could offer either the select element or the multiple choice radio type as in 2,0 to display the unit choices.
4. As the instruction field with its HTML editor has been removed, we can easily add HTML unit editing in the edit_numerical_form without having a more complex display than the 2,0.