The 'wiki' field type

width: specifies the width of the field in the dataform.
height: specifies the height of the field in the dataform.

Works like text but lets the user enter wiki syntax.

[[form]]
fields:
  version:
    label: Fancy text field
    type: wiki
[[/form]]

The specific properties you can use on a wiki field:

The 'wiki' field type ​