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
