[rules-users] Inter-fact comparison

[David Sinclair]

Hi Earnie,

What you are explaining seems pretty straight forward and would more likely
than not be overkill to use a rule engine. Are there other aspects of the
system you are leaving out that warrant the use of Drools?

dave

2010/6/22 Earnest Dyke <earniedyke at yahoo.com>

> Greetings all,
>
> I have a requirement to compare a set of facts against each other,
> calculate a value that indicates the amount of difference (Levenshtein
> distance) between a single attribute on each fact. So I load all of my facts
> into working memory then what? Do I execute a rule first that creates a new
> set of facts which is a Cartesian product of the original set of facts, each
> new fact containing a reference to two original facts and the diff between
> them? Looked at using a custom accumulate function but I don't think that's
> going to do what I need since it is intended to go through a set of facts
> and return a single value.
>
> Any and all related help is appreciated.
>
> Earnie!
>
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