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# [protege-owl] Puzzle of SQWRL collection

Haibo Hu hbhu at cqu.edu.cn
Thu Sep 8 10:34:36 PDT 2011

```Hi All,

I'm writing a SQWRL rule to calculate a ratio of specific individuals (such as ?a and ?b) in sets, like this,

sqwrl:makeSet(?s1, ?a) ∧ sqwrl:size(?size1, ?s1) ∧
sqwrl:makeSet(?s2, ?b) ∧ sqwrl:size(?size2, ?s2) ∧
swrlb:divide(?div, ?size1, ?size2) → sqwrl:select(?div)

It will return an integer. If ?size1 less than ?size2, then the output is 0.

Is there any way to make the result as float?

Thanks.

Regards,
Haibo
----------------------------------
The School of Software Engineering,
Chongqing University, China
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