Thanks, Dave. Suddenly it all makes sense. You are genius. Sorry for wasting your time on this simple problem. I'm can't be too grateful for your help. So all I have to do is to manually eliminate the Rdfs:resource from SuperClass. Very helpful ,thanks again.
-----邮件原件----- 发件人: Dave Reynolds [mailto:[email protected]] 发送时间: 2014年9月9日 15:44 收件人: [email protected] 主题: Re: 答复: 答复: why does the addDomain method affect the domain's SuperClass? On 09/09/14 08:19, huang huiliang wrote: > All codes involved have been listed in my original post. It seems that > I just used the default . And individual model has nothing else. > I don't know what's wrong. OK if you don't need inference then use: OntModel individuals = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM); That will make this go away. If you do need inference then use OWL_MEM_MINI_RULE_INF. What seems to be happening is that the default for OntModels is to specify RDFS reasoning. In RDFS then everything is an rdfs:Resource and every class is a subclass of rdfs:Resource so what it is saying is not wrong. The RDFS reasoner doesn't know about owl:Class but does know about rdfs:domain so as soon as you make the domain statement the reasoner works out a bunch of stuff about class2 but not quite enough to know that class1 is also a subClass of rdfs:Resource (and so remove rdfs:Resource from the direct superclasses). Dave > -----邮件原件----- > 发件人: Dave Reynolds [mailto:[email protected]] > 发送时间: 2014年9月9日 15:12 > 收件人: [email protected] > 主题: Re: 答复: why does the addDomain method affect the domain's > SuperClass? > > Don't know. > > What reasoner configuration are you using? > > Is there any other data in the "individuals" model? > > Dave > > On 09/09/14 08:07, huang huiliang wrote: >> Thank you for your suggestion ,Dave. I modify my code as you said. >> Before p.addDomain(class2) ,the class2's SupClass is : >> http://www.xxx.org.cn/standards/publishing/ontology/cores/class1. >> But after p.addDomain(class2) execute ,class2's has two SupClasses. >> http://www.w3.org/2000/01/rdf-schema#Resource is added to class2's >> SupClasses. >> Now the question is : why would addDomain(class2) add rdfs:Resouce to >> class2's SupClasses. >> Thanks for your attention. >> -----邮件原件----- >> 发件人: Dave Reynolds [mailto:[email protected]] >> 发送时间: 2014年9月9日 14:51 >> 收件人: [email protected] >> 主题: Re: why does the addDomain method affect the domain's SuperClass? >> >> On 09/09/14 07:40, huang huiliang wrote: >>> I'm creating an ontology from excel files and I have some problems >>> to make my program work. >>> >>> The first problem I encounter is that I can't get the right >>> superclass .The simplest code example is below. >>> >>> Code begin: >>> >>> OntModel individuals = ModelFactory.createOntologyModel(); >>> >>> TreeMap<String, String> namespaces=new >>> TreeMap<String,String>(); >>> >>> namespaces.put("pubo", >>> "http://www.xxx.org.cn/standards/publishing/ontology/cores/";); >>> >>> individuals.setNsPrefixes(namespaces); >>> >>> OntClass >>> class1=individuals.createClass(namespaces.get("pubo")+"class1"); >>> >>> class1.setLabel("class1", "en"); >>> >>> OntClass >>> class2=individuals.createClass(namespaces.get("pubo")+"class2"); >>> >>> class2.setLabel("class2", "en"); >>> >>> class2.setSuperClass(class1); >>> >>> System.out.println(class2.getSuperClass().getURI()); >>> >>> DatatypeProperty p = >>> individuals.createDatatypeProperty(namespaces >>> >>> .get("pubo") + "haha"); >>> >>> p.addDomain(class2); >>> >>> System.out.println(class2.getSuperClass().getURI()); >>> >>> Code end >>> >>> The first output is: >>> <http://www.xxx.org.cn/standards/publishing/ontology/cores/class1> >>> http://www.xxx.org.cn/standards/publishing/ontology/cores/class1 >>> >>> The second output is : http://www.w3.org/2000/01/rdf-schema#Resource >>> >>> I have no idea why the two output are different? Have I done >>> something wrong? Any suggestions? >> >> Mostly likely possibility is that getSuperClass is simply picking a >> different random value from the set of super classes (see the javadoc). >> I don't know if getSuperClass is supposed to list only direct >> superclasses but if you are getting rdfs:Resource then probably not. >> >> Suggest using listSuperClasses(true) to find out what's going on. >> >> Dave >> >
