anchor.diff:            | Number -> col, Value.Number(Double.Parse value)
             | Date null -> col, Value.Date(DateTimeOffset.Parse(value, ddmm))
             | Date c -> col, Value.Date(DateTimeOffset.Parse(value, c))
  -          | OneZero | Bool -> 
  +          (*| OneZero *)
  +          | Bool -> 
                 let b = 
                   if value.ToLower() = "true" then true
                   elif value.ToLower() = "false" then false
  
positive.code: let inferType (s:string) =
    if fst (Decimal.TryParse(s)) then 
      let d = Decimal.Parse(s)
      if d = 1M || d = 0M then OneZero
      else Number
    elif tryDate mmdd s && tryDate ddmm s then Date null
    elif tryDate mmdd s then Date mmdd
    elif tryDate ddmm s then Date ddmm
  
negative.code: 
  let typeName = function
    | String | Any -> "string"
    (*| OneZero *)| Bool -> "bool"
    | Date _ -> "date"
    | Number -> "number"
  
  