DataGrid custom behaviors

[snm]

I have DataGrid table with 7 columns, which should have 1 of 3 different behaviors ( for dates, unicode text and for floating point numbers). I know how to make "default column behavior", and how to make separate column behaviors for each column.

The question I have is if and how to make 3 "default custom behaviors" as:
- default date behaviors
- default floating point behaviors
- default unicodeText behaviors

and set particular columns as below:

2 columns with dates to "default date behaviors",
2 columns with floating point numbers to "default floating point behaviors"
3 columns with unicode text to "default unicodeText behaviors"

Thanks for any help,
Marek