Protege OWL API体验
前两天使用Jena来读取、创建和保存OWL文件。今天尝试使用Protege OWL API来操作。
其实Protege OWL API也是通过封装了Jena包来操作OWL文件的，其结构与Jena类似。
1. 创建OWL模型
1 OWLModel owlModel = ProtegeOWL.createJenaOWLModel();
2. 创建OWL类及数据属性
//创建Person类
OWLNamedClass personCls = owlModel.createOWLNamedClass("Person");
//创建一个name的数据属性
OWLDatatypeProperty nameProp = owlModel.createOWLDatatypeProperty("name");
//name属性的数据值域为xsd:String
nameProp.setRange(owlModel.getXSDstring());
//name属性域为Person类
nameProp.setDomain(personCls);
3. 创建对象属性
1 //创建对象属性children
2 OWLObjectProperty childrenProp = owlModel.createOWLObjectProperty("children");
3 //children属性的数据值域为person
4 childrenProp.setRange(personCls);
5 //children属性域为Person类
6 childrenProp.setDomain(personCls);
4. 创建类实例
1 //创建person类的实例Darwin
2 RDFIndividual darwin = personCls.createRDFIndividual("Darwin");
3 //设置darwin对象的name属性
4 darwin.setPropertyValue(nameProp, "Darwin");
5 //设置darwin对象的age属性值为0
6 darwin.setPropertyValue(ageProp, "0");
5. 将其他数据类型被封装成一个RDFLiteral，如xsd:date
1 //其他数据类型被封装成一个RDFLiteral
2 //获取xsd:date的数据类型
3 RDFSDatatype xsdDate = owlModel.getRDFSDatatypeByName("xsd:date");
4 //以xsd:date数据类型作为值域创建日期的数据属性
5 OWLDatatypeProperty dateProp = owlModel.createOWLDatatypeProperty("date", xsdDate);
6 dateProp.setDomain(personCls);
7
8 //创建
9 RDFSLiteral dateLiteral = owlModel.createRDFSLiteral("2010-09-19", xsdDate);
10 //用RDFSLiteral对象设置hans实例的日期属性值
11 hans.setPropertyValue(dateProp, dateLiteral);
12
13 //从hans实例中获取RDFSLiteral对象
14 RDFSLiteral hansDate = hans.getPropertyValueLiteral(dateProp);
15 System.out.println("hans'Date: " + hansDate);
6. 源代码：Ex1.java
1 package org.bluemaple;
2
3 import java.io.FileNotFoundException;
4 import java.io.FileOutputStream;
5 import java.io.IOException;
6 import java.io.OutputStreamWriter;
7 import java.io.UnsupportedEncodingException;
8 import java.io.Writer;
9 import java.util.Collection;
10 import java.util.Iterator;
11
12 import edu.stanford.smi.protege.exception.OntologyLoadException;
13 import edu.stanford.smi.protegex.owl.ProtegeOWL;
14 import edu.stanford.smi.protegex.owl.model.OWLDatatypeProperty;
15 import edu.stanford.smi.protegex.owl.model.OWLIndividual;
16 import edu.stanford.smi.protegex.owl.model.OWLModel;
17 import edu.stanford.smi.protegex.owl.model.OWLNamedClass;
18 import edu.stanford.smi.protegex.owl.model.OWLObjectProperty;
19 import edu.stanford.smi.protegex.owl.model.RDFIndividual;
20 import edu.stanford.smi.protegex.owl.model.RDFSClass;
21 import edu.stanford.smi.protegex.owl.model.RDFSDatatype;
22 import edu.stanford.smi.protegex.owl.model.RDFSLiteral;
23 import edu.stanford.smi.protegex.owl.writer.rdfxml.rdfwriter.OWLModelWriter;
24
25 /**
26 * 示例代码，知识共享
27 * @author tanyongbin
28 * 2011-8-1
29 * Email: briandottan@gmail.com
30 */
31 public class Ex1 {
32
33 /**
34 * @param args
35 */
36 public static void main(String[] args) {
37 // TODO Auto-generated method stub
38 //获得OWLModel对象
39 try {
40 OWLModel owlModel = ProtegeOWL.createJenaOWLModel();
41
42 //创建Person类
43 OWLNamedClass personCls = owlModel.createOWLNamedClass("Person");
44 //创建一个name的数据属性
45 OWLDatatypeProperty nameProp = owlModel.createOWLDatatypeProperty("name");
46 //name属性的数据值域为xsd:String
47 nameProp.setRange(owlModel.getXSDstring());
48 //name属性域为Person类
49 nameProp.setDomain(personCls);
50
51 //创建数据属性age
52 OWLDatatypeProperty ageProp = owlModel.createOWLDatatypeProperty("age");
53 //age属性的数据值域为xsd:int
54 ageProp.setRange(owlModel.getXSDint());
55 //age属性域为Person类
56 ageProp.setDomain(personCls);
57
58 //创建对象属性children
59 OWLObjectProperty childrenProp = owlModel.createOWLObjectProperty("children");
60 //children属性的数据值域为person
61 childrenProp.setRange(personCls);
62 //children属性域为Person类
63 childrenProp.setDomain(personCls);
64
65 //创建person类的实例Darwin
66 RDFIndividual darwin = personCls.createRDFIndividual("Darwin");
67 //设置darwin对象的name属性
68 darwin.setPropertyValue(nameProp, "Darwin");
69 //设置darwin对象的age属性值为0
70 darwin.setPropertyValue(ageProp, "0");
71
72 //创建person类实例Holger
73 RDFIndividual holger = personCls.createRDFIndividual("Holger");
74 //设置holger对象的name属性
75 holger.setPropertyValue(nameProp, "Holger");
76 //设置holger对象的age属性值为0
77 holger.setPropertyValue(ageProp, "33");
78
79 //设置Holger与Darwin之间的对象属性Childern
80 holger.setPropertyValue(childrenProp, darwin);
81
82 //创建类Brother
83 OWLNamedClass brotherCls = owlModel.createOWLNamedClass("Brother");
84 //设置Brother类的父类为Person类
85 brotherCls.addSuperclass(personCls);
86 //移除Brother默认的父类owl:Thing，该类的父类为owl:Thing类
87 brotherCls.removeSuperclass(owlModel.getOWLThingClass());
88 //另外一种创建Person子类的方法
89 OWLNamedClass sisterCls = owlModel.createOWLNamedSubclass("Sister", personCls);
90
91 //创建Brother类的实例Hans
92 OWLIndividual hans = brotherCls.createOWLIndividual("Hans");
93 //获取Brother的实例对象集合，参数为false说明只获取直接子类
94 Collection brothers = brotherCls.getInstances(false);
95 //输出brother的实例集合中是否包含Hans这个实例
96 System.out.println("brother的实例集合中是否包含Hans：" + brothers.contains(hans));
97 //输出brother的实例集合总数
98 System.out.println("brother的实例集合总数：" + brothers.size());
99
100 //获得Person类的所有直接和间接对象
101 Collection persons = personCls.getInstances(true);
102 //输出person的实例集合总数
103 System.out.println("person所有的实例集合总数：" + persons.size());
104 //判断Person类对象的实例是否包含holgi
105 System.out.println("判断Person类是否包含holgi实例：" + persons.contains(holger));
106 //获取hans对象的类，然后判断是否跟Brother类相等
107 System.out.println("判断hans的类型是否为Brother类：" + hans.getRDFType().equals(brotherCls));
108 //判断hans是否为Brother类的对象
109 System.out.println("判断hans是否为Brother类:" + hans.hasRDFType(brotherCls));
110 //判断hans是否为Person类的直接实例
111 System.out.println("判断hans是否为Person类的直接实例:" + hans.hasRDFType(personCls, false));
112 //判断hans是否为Person类的间接实例
113 System.out.println("判断hans是否为Person类的间接实例:" + hans.hasRDFType(personCls, true));
114
115 //获取Darwin实例的属性值
116 System.out.println("Darwin实例的name属性值为：" + darwin.getPropertyValue(nameProp)
117 + "age属性值为：" + darwin.getPropertyValue(ageProp));
118
119 //其他数据类型被封装成一个RDFLiteral
120 //获取xsd:date的数据类型
121 RDFSDatatype xsdDate = owlModel.getRDFSDatatypeByName("xsd:date");
122 //以xsd:date数据类型作为值域创建日期的数据属性
123 OWLDatatypeProperty dateProp = owlModel.createOWLDatatypeProperty("date", xsdDate);
124 dateProp.setDomain(personCls);
125 //创建
126 RDFSLiteral dateLiteral = owlModel.createRDFSLiteral("2010-09-19", xsdDate);
127 //用RDFSLiteral对象设置hans实例的日期属性值
128 hans.setPropertyValue(dateProp, dateLiteral);
129
130 //从hans实例中获取RDFSLiteral对象
131 RDFSLiteral hansDate = hans.getPropertyValueLiteral(dateProp);
132 System.out.println("hans'Date: " + hansDate);
133
134 //打印所有类的层次结构
135 printClassTree(personCls, "");
136
137 String filePath = "D:\\ss.owl";
138 FileOutputStream outFile= new FileOutputStream(filePath);
139 Writer out = new OutputStreamWriter(outFile,"UTF-8");
140 OWLModelWriter omw = new OWLModelWriter(owlModel,
141 owlModel.getTripleStoreModel().getActiveTripleStore(), out);
142 omw.write();
143 out.close();
144 } catch (OntologyLoadException e) {
145 // TODO Auto-generated catch block
146 e.printStackTrace();
147 System.exit(-1);
148 } catch (FileNotFoundException e) {
149 // TODO Auto-generated catch block
150 e.printStackTrace();
151 } catch (UnsupportedEncodingException e) {
152 // TODO Auto-generated catch block
153 e.printStackTrace();
154 } catch (IOException e) {
155 // TODO Auto-generated catch block
156 e.printStackTrace();
157 }
158
159 }
160
161 //递归调用打印所有类的层次关系,indentation参数是使的打印的子类比其父类更缩进
162 private static void printClassTree(RDFSClass cls, String indentation) {
163 // TODO Auto-generated method stub
164 System.out.println(indentation + cls.getLocalName());
165 //遍历打印子类
166 for(Iterator subClses = cls.getSubclasses(false).iterator(); subClses.hasNext();){
167 RDFSClass subCls = (RDFSClass)subClses.next();
168 printClassTree(subCls, indentation + " ");
169 }
170 }
171
172 }
