【问题标题】:Extract properties associated with classes from RDF file从 RDF 文件中提取与类关联的属性
【发布时间】:2026-01-11 20:35:01
【问题描述】:

我已经编写了代码来从我的 RDF 文件中提取类和子类。这是代码。我正在使用 dotNetRDf 库。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System;
using System.Linq;
using VDS.RDF;
using VDS.RDF.Ontology;
using VDS.RDF.Parsing;


namespace ConsoleApplication1
{
class Program
{
    static void Main(string[] args)
    {
    //
        OntologyGraph g = new OntologyGraph();
        FileLoader.Load(g, "D:\\SBIRS.owl");
        OntologyClass someClass = g.CreateOntologyClass(new    
        Uri("http://www.semanticweb.org/ontologies/2012/0/SBIRS.owl#Shape"));

                  //Write out Super Classes

        foreach (OntologyClass c in someClass.SuperClasses)
        {
           Console.WriteLine("Super Class: " + c.Resource.ToString());
        }
        //Write out Sub Classes



        foreach (OntologyClass c in someClass.SubClasses)
        {

            Console.WriteLine("Sub Class: " + c.Resource.ToString());
        }
        Console.Read();
    }
}

}

但现在我想提取与类关联的属性。我尝试使用 OntologyProperty 类但无法获得所需的输出

【问题讨论】:

    标签: semantics rdf dotnetrdf


    【解决方案1】:

    extract the properties associated with the classes 是什么意思?

    这可能意味着很多事情,你的意思是简单地找到具有该类作为域/范围的属性吗?

    您不能使用仅封装底层 API 的 Ontology API 来执行此操作,但您可以像这样使用较低级别的 API:

    //Assuming you've already set up your Graph and Class as above...
    
    //Find properties who have this class as a domain
    INode domain = g.CreateUriNode(new Uri(NamespaceMapper.RDFS + "domain"));
    IEnumerable<OntologyProperty> ps = g.GetTriplesWithPredicateObject(domain, someClass).Select(t => new OntologyProperty(t.Subject, g));
    
    //Now iterate over ps and do what you want with the properties
    

    同样,您可以对rdfs:range 执行相同的操作来获取将类作为范围的属性

    【讨论】: