英文:
how create named graphs in GraphDB?
问题
如何在GraphDB中创建命名图？
需要通过工具（如RDFLib或Apache Jena）将RDF文件的格式从三元组更改为N-Quads吗？或者有更简单的方法吗？
英文:
how create named graphs in GraphDB?
Is it necessary to change the format de rdf file from triples to n-quads through tools (like RDFLib or Apache Jena) or is there an easier way?
答案1
得分: 1
不一定。当你在GraphDB中使用GraphDB工作台进行导入时，它允许你指定一个命名图，如下所示。
在编程方面，你可以使用RDF4J来实现，需要注意的是，在RDF4J中，命名图被称为上下文。
String address = "http://localhost/"
String repositoryName = "myRepo"
File rdfFile = new File("some triples")
HTTPRepository repository = new HTTPRepository(address, repositoryName)
try (RepositoryConnection connection = repository.getConnection()) {
connection.begin()
connection.add(rdfFile, RDFFormat.TURTLE, "http://MyGraph,com")
connection.commit()
} catch (RepositoryException re){
re.printStackTrace()
}
要使用RDF4J，你需要添加以下依赖项：
<dependency>
<groupId>org.eclipse.rdf4j</groupId>
<artifactId>rdf4j-client</artifactId>
<version>4.2.3</version>
<type>pom</type>
</dependency>
英文:
Not necessarily. When you do the import into GraphDB using the GraphDB workbench, it allows you to specify a named graph, as shown below.
Programmatically you can do it as follows using RDF4J. Note that in RDF4J named graphs are referred to as contexts.
String address = "http://localhost/"
String repositoryName = "myRepo"
File rdfFile = new File("some triples");
HTTPRepository repository = new HTTPRepository(address, repositoryName);
try (RepositoryConnection connection = repository.getConnection()) {
connection.begin();
connection.add(rdfFile, RDFFormat.TURTLE, "http://MyGraph,com");
connection.commit();
} catch (RepositoryException re){
re.printStackTrace();
}
To use RDf4J you will need to add the following dependency:
<dependency>
<groupId>org.eclipse.rdf4j</groupId>
<artifactId>rdf4j-client</artifactId>
<version>4.2.3</version>
<type>pom</type>
</dependency>
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