Please post JessTab-related message to the protege-owl or
protege-discussion mailing list, as subscribers of the jess-users list
don't necessarily know how JessTab maps Protege objects to Jess
constructs and details of Protege (OWL) API (which you'd use to create
classes and instances.)
The answers to your questions are in the JessTab and Jess manuals.
Basically, given the mapping from Protege to Jess, you'd probably write
two rules that looks roughly like the following:
(defrule
(object (is-a Earthquake)(OBJECT ?earthquake)
(magnitude ?m&:(> ?m 6))(in ?country)(affect ?affected&:(not
(member$ ?country ?affected))))
=> (JessTab or Protege (OWL) API call to add ?country to the "affect"
property of the ?earthquake instance)
)
(defrule
(object (is-a Earthquake)(in ?country)(affect ?affected&:(member$
?country ?affected))
(object (is-a Country)(OBJECT ?country)(has-facility ?dam&:(JessTab
function to check that ?dam is an instance of the Dam class)
=> (JessTab/Protege API call to check existence of Flood class. If not,
create the Flood class, then create an instance of Flood and add
?country to the "affect" property of the Flood instance)
)
You can find the appropriate JessTab and Protege (OWL) API calls in
their respective manuals. The Jess manual describes the syntax for
making Java API calls.
Samson
Hemant Joshi wrote:
I have OWL with few classes and slots. I am new Jess and I would like to
add few simple inference rules through JessTab.
Class Hazard has subclass Earthquake which has property magnitude
Class County has object property contains_facility which has Range of
type Facility
Class Facility has a sub-class Dam
I want to create simple rule for instances X and Y like
1) If Earthquake.magnitude in county X "*is greater than or equal to*" 6
If Earhquake *affects *county X and county X *has *Dam Y
Then *create new Hazard sub-class* called Flood (and show
it affects county X)
Else
Earthquake *affects *county X
How do we write Jess rule to do arithmetic comparison and add
class/instances based on that?
-Hemant
--
Samson Tu email: [EMAIL PROTECTED]
Senior Research Scientist web: www.stanford.edu/~swt/
Stanford Medical Informatics phone: 1-650-725-3391
Stanford University fax: 1-650-725-7944
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