标签: turtle-rdf

以下是我在N3中创建类的方法:

:Person a rdfs:Class.

以下是如何指定特定的ressource是该类的实例:

:Pat a :Person.

问题:我想创建一个包含20000多个实例的类(以编程方式生成).:Pat a :Person.为我的20000个实例编写整体使得本体文件变得冗长.

问题:是否有解决方案使文件变小？

我现在正在研究一个项目,我需要一些帮助.

基本上,我需要将以下RDF转换为Java类的表示.我把RDF读到一个模型,从那里我被卡住了.

    StringReader in = new StringReader(resultTemp);
    Model model = ModelFactory.createDefaultModel();
    model.read(in, null, "TURTLE");

我尝试使用函数listSubjectsWithProperty(属性arg0,RDFNode arg1)和StmtIterator,但我无法弄明白.我非常感谢一些帮助.

RDF:

@prefix d: <http://www.w3.org/2001/XMLSchema#> .
@prefix p: <http://parking.kmi.open.ac.uk/ontologies/parking#> .
@prefix s: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix g: <http://www.w3.org/2003/01/geo/wgs84_pos#> .
@prefix o: <http://linkedgeodata.org/ontology/> .

<http://parking.kmi.open.ac.uk/data/parks/4751.3> a o:Parking ;
    g:lat "50.8509406"^^d:double ;
    g:long "-0.983707"^^d:double ;
    p:binaryAvailability "true"^^d:boolean .

<http://parking.kmi.open.ac.uk/data/parks/4934.6> a o:Parking ;
    g:lat "50.8737457"^^d:double ;
    g:long "-0.9731118"^^d:double ;
    p:binaryAvailability "true"^^d:boolean .

<http://parking.kmi.open.ac.uk/data/parks/4934.8> a o:Parking ;
    g:lat "50.873617"^^d:double ;
    g:long "-0.9722267"^^d:double ;
    p:binaryAvailability "true"^^d:boolean .

<http://parking.kmi.open.ac.uk/data/parks/4934.3> a o:Parking ; …

我刚刚导入了jena库来eclipse在rdf-s上工作,这是我的第一次尝试,但我无法读取乌龟(.ttl)文件.

我用以下方式尝试了它:

import java.io.*;
import java.util.*;
import com.hp.hpl.jena.rdf.model.*;

public class Simpsons {

public static void main(String[] args) throws IOException {
    Model model=ModelFactory.createDefaultModel();
    model.read(new FileInputStream("simpsons.ttl"),null);

}

}

我得到的错误如下:

Exception in thread "main" org.apache.jena.riot.RiotException: [line: 1, col: 1 ] Content is not allowed in prolog.
at org.apache.jena.riot.system.ErrorHandlerFactory$ErrorHandlerStd.fatal(ErrorHandlerFactory.java:136)
at org.apache.jena.riot.lang.LangRDFXML$ErrorHandlerBridge.fatalError(LangRDFXML.java:252)
at com.hp.hpl.jena.rdf.arp.impl.ARPSaxErrorHandler.fatalError(ARPSaxErrorHandler.java:48)
at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.warning(XMLHandler.java:209)
at com.hp.hpl.jena.rdf.arp.impl.XMLHandler.fatalError(XMLHandler.java:239)
at org.apache.xerces.util.ErrorHandlerWrapper.fatalError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLScanner.reportFatalError(Unknown Source)
at org.apache.xerces.impl.XMLDocumentScannerImpl$PrologDispatcher.dispatch(Unknown Source)
at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.DTDConfiguration.parse(Unknown Source) …

我是SPARQL和RDF的新手,我想知道SPARQL中下面的确切含义是什么？

[] vc:n ?vcard .

完整的查询是

PREFIX vc: <http://www.w3.org/2006/vcard/ns#>

SELECT ?given ?family

WHERE{

    [] vc:n ?vcard .

    OPTIONAL {?vcard vc:given-name ?given .}

    OPTIONAL {?vcard vc:family-name ?family .}

}

在RDF-Turtle中,使用@base前缀和空前缀(只是:)有什么区别？

在W3C 的 RDF Turtle 文档中，我遇到了两个使用电子邮件地址作为 IRI 的示例（16 和 17）：

_:b <http://xmlns.com/foaf/0.1/mbox> <bob@example.com> .

据我了解，如果电子邮件地址前面带有适当的方案（即mailto:bob@example.com. 如果上例中的电子邮件地址应该是有效的 URI，则该语句实际上应为：

_:b <http://xmlns.com/foaf/0.1/mbox> <mailto:bob@example.com> .

这是文档中的错误还是 IRI（与 URI 相对）不需要方案？

这些陈述是否相同？如果我删除owl:Restriction和有任何问题owl:Class.它们看起来似乎是多余的,但这总是我在网上看到的例子. owl:onProperty有域名owl:restriction,owl:restriction是一个子类owl:class.

:myClass owl:equivalentClass  
[a owl:Class ;
          owl:intersectionOf (
          [ a owl:Restriction ; owl:onProperty :hasProp  ; owl:allValuesFrom  :SomeOtherClass ]
          [ a owl:Restriction ; owl:onProperty :hasChild ; owl:someValuesFrom :SomeOtherClass ] ) ] .



:myClass owl:equivalentClass  
[owl:intersectionOf  (
  [ owl:onProperty :hasProp ; owl:allValuesFrom  :SomeOtherClass ]
  [ owl:onProperty :hasProp ; owl:someValuesFrom :SomeOtherClass ] )
] .

.ttl文件是否可以包含对其他.ttl文件的引用？（以C语言的#include形式工作）

考虑以下RDF:

semapi:BaseClass     a rdfs:Class; 
                     rdfs:subClassOf rdfs:Class .

semapi:hasChainTo a rdf:Property; 
                   rdfs:domain semapi:BaseClass;
                   rdfs:range  semapi:BaseClass .                   

semapi:DerivedClass  a rdfs:Class; rdfs:subClassOf semapi:BaseClass .                  

instances:Instance1 a semapi:DerivedClass;
                    semapi:hasChainTo (
                        [
                            a semapi:DerivedClass;
                                    semapi:hasChainTo (
                                           [C1]
                                           [C2]
                                    )
                            ]
                     )

如果semapi:hasChainTo rdfs:range semapi:BaseClass那么它意味着列表是rdf:type semapi:BaseClass.

我真正的意思是说每个项目在列表rdf:type(EI, [C1] rdf:type semapi:BaseClass,[C2] rdf:type semapi:BaseClass,...)

我怎样才能做到这一点？我需要猫头鹰(最好不要)吗？

我有以下有效的Turtle语法:

@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>.
@prefix sc: <http://education.data.gov.uk/def/school/School#>.
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>.
@prefix geo: <http://www.w3.org/2003/01/geo/wgs84_pos>.

<http://example.com/schools/#1000> a <http://education.data.gov.uk/def/school/School> . 
<http://example.com/schools/#1000> <http://education.data.gov.uk/def/school/establishmentName>    "Atherstone Early Years Centre". 
<http://example.com/schools/#1000> <http://education.data.gov.uk/def/school/establishmentNumber> "1000". 
<http://example.com/schools/#1000> <http://education.data.gov.uk/def/school/Address>  [<http://education.data.gov.uk/def/school/address1> "RATCLIFFE ROAD";     <http://education.data.gov.uk/def/school/postcode> "CV9 1LF"]. 
<http://example.com/schools/#1000> <http://education.data.gov.uk/def/school/establishmentType> "Nursery".
<http://example.com/schools/#1000> <http://education.data.gov.uk/def/school/districtAdministrative> "North Warwickshire".
<http://example.com/schools/#1000> <http://education.data.gov.uk/def/school/uniqueReferenceNumber> "2016".
<http://example.com/schools/#1000> geo:lat "52.5786677".
<http://example.com/schools/#1000> geo:long "-1.5420408".

我基本上定义了一个学校对象,id#1000之后我添加了属性.我想知道我是否可以<http://example.com/schools/#1000>在每个属性之前摆脱定义,并以某种方式用括号或其他东西包围属性.有任何想法吗？