Re: JESS: JessTab and Protege OWL rule
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 Tuemail: [EMAIL PROTECTED] Senior Research Scientistweb: www.stanford.edu/~swt/ Stanford Medical Informatics phone: 1-650-725-3391 Stanford University fax: 1-650-725-7944 To unsubscribe, send the words 'unsubscribe jess-users [EMAIL PROTECTED]' in the BODY of a message to [EMAIL PROTECTED], NOT to the list (use your own address!) List problems? Notify [EMAIL PROTECTED]
JESS: JessTab and Protege OWL rule
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
JESS: persistent storage of facts and rules
g'day everyone, when it comes to sotrage of rules and facts, how are most people handling it? Are you using JessML? Also, has anyone been storing the JessML in a database? as far as facts are concerned, do y'all just store them in plain text files? i also noticed that the Rete object is serializable, is this feature used often? cheers , matt -- Matthew Hutchinson Ph.D. CandidateDepartment of Spatial SciencesCurtin University of TechnologyGPO Box U1987Perth, Western Australia 6845Visiting Researcher Department of Geography and PlanningUniversity of AkronAkron, Ohio USA
