> If we want to get the maximum score student got among three subjects > (Robotics, Semantic Web, Research Methods) using Jena rules. > > ?x rdf:type std:Student + ?x std:RoboticsScore ?Rscore + ?x > std:SemanticWebScore ?SMscore + ?x ResearchMethodScore ?RMscore > + max(Rscore,SMscore,RMscore,maximun) THEN ???? > > I have two questions here: > > 1) Is the max(Rscore,SMscore,RMscore,maximun) calculate max and assign it > to the (fourth)maximum variable? Documentation is here: https://jena.apache.org/documentation/inference/#builtin-primitives
max(?a, ?b, ?c) takes two arguments ?a,?b and assigns the value to ?c > 2) How would the THEN part be? *If these values give me max, then how can I > know that this maximum value belongs to Robotic, Semantic web or Research > methods?* Not possible, as max only assigns the maximum value to the variable as you already know. > *I want to determine "Favorite subject" of student so if a student got max > score in a subject, that will be his/her favorite subject. * > -- Lorenz Bühmann AKSW group, University of Leipzig Group: http://aksw.org - semantic web research center
