感谢您的回答，但不幸的是我没有在控制台中得到任何结果，在这里我附上我的代码，请指导我在哪里犯了错误。
FileManager.get().addLocatorClassLoader(test.class.getClassLoader());
Model model=FileManager.get().loadModel("H:/EclipseWorkplace/MuseumDatabaseRecommendation/src/data3.rdf");
String spr="prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"+
"prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n"+
"prefix crm: <urn:x-stackoverflow:example#>\n"+
"\n"+
"SELECT * WHERE{\n"+
" [ crm:E21_Person/rdfs:label ?creator\n"+
" ; crm:P108i_was_produced_by [ crm:P126_employed [ rdfs:label ?material ]\n"+
" ; crm:P4_has_time-span [ crm:P82_at_some_time_within ?timespan ]\n"+
" ]\n"+
" ; crm:P3_has_note [ a crm:P102_has_title\n"+
" ; rdfs:label ?title\n"+
" ]\n"+
" ]\n"+
" FILTER( ?creator = \"Brett WHITELEY\" ).\n"+
"}";
Query query = QueryFactory.create(spr); //s2 = the query above
QueryExecution qExe = QueryExecutionFactory.create( query,model );
//QueryExecution qExe = QueryExecutionFactory.sparqlService( "http://dbpedia.org/sparql", query );
ResultSet results = qExe.execSelect();
ResultSetFormatter.out(System.out, results, query);
我当前的输出是
-----------------------------------------
| creator | material | timespan | title |
=========================================
-----------------------------------------
感谢您的时间。
答案 0 :(得分：4)
输入数据
为了便于阅读，我将您的模型重新构建为TURTLE语法，供其他人阅读。
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix crm: <http://www.cidoc-crm.org/cidoc-crm/> .
<http://phdprototype.tk/collectionimage /4D0BFF17-5810-4644-A550-D35EE090D4A8.png>
a "Painting" ;
rdfs:label "Brett WHITELEY" ;
crm:E21_Person [ a <E39_Actor> ;
rdfs:label "Brett WHITELEY"
] ;
crm:E62_String "Painting\n" ;
crm:P108i_was_produced_by [ a crm:E12_Production ;
crm:P126_employed [ a crm:E57_Material ;
rdfs:label "Oil"
] ;
crm:P4_has_time-span [ a crm:E52_Time-Span ;
crm:P82_at_some_time_within "\n 1976\n "
]
] ;
crm:P3_has_note [ a crm:P102_has_title ;
rdfs:label "Interior with Time Past"
] ;
crm:P7_took_place_at [ a crm:E53_Place ;
crm:E44_Place_Appellation " \n 5D\n "
] ;
crm:P91_has_unit [ a crm:E58_Measurement_Unit ;
rdfs:label "182.0 h * 200.0 w cm"
] .
此数据存在一些问题。例如，您的绘画有rdf:type普通文字"painting"，这非常糟糕。这由a "painting"属性 - 对象对表示。我们可以对此数据执行查询，但您可能希望重新构建本体，以便它正确使用rdf:type这样的术语。
<强>查询
对于提供的示例数据，以下查询将提取您要查找的内容：
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix crm: <http://www.cidoc-crm.org/cidoc-crm/>
SELECT * WHERE{
[ crm:E21_Person/rdfs:label ?creator
; crm:P108i_was_produced_by [ crm:P126_employed [ rdfs:label ?material ]
; crm:P4_has_time-span [ crm:P82_at_some_time_within ?timespan ]
]
; crm:P3_has_note [ a crm:P102_has_title
; rdfs:label ?title
]
]
FILTER( ?creator = "Brett WHITELEY" ).
}
将导致：
----------------------------------------------------------------------------------
| creator | material | timespan | title |
==================================================================================
| "Brett WHITELEY" | "Oil" | "\n 1976\n " | "Interior with Time Past" |
----------------------------------------------------------------------------------
请注意，这是根据您的特定样本数据量身定制的。您需要调整此查询以匹配实际允许的结构。对于（假设的）示例，TimeSpan实例有时可能具有crm:P82_at_some_time_span属性，或者可能有一些crm:exampleProperty将其与另一个值相关联。在这种情况下，您需要修改查询以使用属性路径来匹配它。
示例代码
public static final String queryString = "prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>\n"+
"prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>\n"+
"prefix crm: <http://www.cidoc-crm.org/cidoc-crm/>\n"+
"\n"+
"SELECT * WHERE{\n"+
" [ crm:E21_Person/rdfs:label ?creator\n"+
" ; crm:P108i_was_produced_by [ crm:P126_employed [ rdfs:label ?material ]\n"+
" ; crm:P4_has_time-span [ crm:P82_at_some_time_within ?timespan ]\n"+
" ]\n"+
" ; crm:P3_has_note [ a crm:P102_has_title\n"+
" ; rdfs:label ?title\n"+
" ]\n"+
" ]\n"+
" FILTER( ?creator = \"Brett WHITELEY\" ).\n"+
"}";
public static final Query query = QueryFactory.create(queryString);
@Test
public void test() throws Exception {
final Model model = ModelFactory.createDefaultModel();
try( final InputStream in = this.getClass().getResourceAsStream("/so.rdf") ) {
model.read(in, null, "RDF/XML");
}
model.write(System.out, "TTL");
System.out.println("=================================================================");
System.out.println(queryString);
System.out.println("=================================================================");
try( final QueryExecution exec = QueryExecutionFactory.create(query, model) ) {
ResultSetFormatter.out(System.out, exec.execSelect(), query);
}
}