我是语义Web领域的新手,我正在尝试使用JENA创建一个Java模型来从OWL文件中提取类,子类和/或注释。
任何有关如何做这种事情的帮助/指导将不胜感激。
谢谢
最佳答案
您可以使用Jena Ontology API进行操作。该API允许您从owl文件创建本体模型,然后提供对Java中存储在本体中的所有信息的访问。
这是Jena ontology的快速介绍。本简介包含有关Jena Ontology入门的有用信息。
该代码通常如下所示:
String owlFile = "path_to_owl_file"; // the file can be on RDF or TTL format
/* We create the OntModel and specify what kind of reasoner we want to use
Depending on the reasoner you can acces different kind of information, so please read the introduction. */
OntModel model = ModelFactory.createOntologyModel(OntModelSpec.OWL_MEM);
/* Now we read the ontology file
The second parameter is the ontology base uri.
The third parameter can be TTL or N3 it represents the file format*/
model.read(owlFile, null, "RDF/XML");
/* Then you can acces the information using the OntModel methods
Let's access the ontology properties */
System.out.println("Listing the properties");
model.listOntProperties().forEachRemaining(System.out::println);
// let's access the classes local names and their subclasses
try {
base.listClasses().toSet().forEach(c -> {
System.out.println(c.getLocalName());
System.out.println("Listing subclasses of " + c.getLocalName());
c.listSubClasses().forEachRemaining(System.out::println);
});
} catch (Exception e) {
e.printStackTrace();
}
// Note that depending on the classes types, accessing some information might throw an exception.
这是Jena Ontology API JavaDoc。
我希望它是有用的!