on a related note I do plan to add OTHERWISE support at a DRL level, just no time to do it right now. Once it's supported at a DRL level, you won't need to as much work on figuring out the inverse options etc.

Mark
On 31/03/2011 20:25, Michael Anstis wrote:

Hi,

I'm adding support for "otherwise" to (for the time being) the guided decision table in Guvnor.

The idea being if you set a cell to represent "otherwise" the generated rule is the opposite of the accumulation of the other cells; perhaps best explained with an example:-

Person( name == )
Mark
Kris
Geoffrey
<otherwise>

This would generate:-

Person(name not in ("Mark", "Kris", "Geoffrey")

Equals is the simple example, this is my thoughts for the other operators we might like to support:-

!= becomes "in (<list of the other cells' values)"

< becomes ">= the maximum value of the other cells' values

For example:-

Person ( age < )
10
20
30
<otherwise>

Person ( age >= 30 )

<= becomes "> the maximum value of the other cells' values

> becomes "<= the minimum value of the other cells' values

>= becomes "< the minimum value of the other cells' values

"in" becomes "not in (<a list of all values contained in all the other cells' lists of values>)"

For example:-

Person ( name in )
Jim, Jack
Lisa, Jane, Paul
<otherwise>

Person ( name not in ("Jim", "Jack", "Lisa", "Jane", "Paul" ) )

I'm not sure there is a simple solution for "matches" and "soundslike" but welcome advice, although a possibility might be to create a compound field constraint:-

Person ( name soundslike )
Fred
Phil

not Person ( name soundslike "Fred" || soundslike "Phil" )

Would this be considered the most suitable approach?

Inputs and thoughts welcome.

Thanks,

Mike
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