图形b+;Lucene索引:我可以得到匹配的谓词/文本吗?
接下来,我设置了一个包含多个(文字)谓词的索引:图形b+;Lucene索引:我可以得到匹配的谓词/文本吗?,lucene,graphdb,Lucene,Graphdb,接下来,我设置了一个包含多个(文字)谓词的索引: PREFIX luc: <http://www.ontotext.com/owlim/lucene#> INSERT DATA { luc:index luc:setParam "uris" . luc:include luc:setParam "literals" . luc:moleculeSize luc:setParam "1" .
PREFIX luc: <http://www.ontotext.com/owlim/lucene#>
INSERT DATA {
luc:index luc:setParam "uris" .
luc:include luc:setParam "literals" .
luc:moleculeSize luc:setParam "1" .
luc:includePredicates luc:setParam "http://purl.org/dc/terms/title http://www.w3.org/2000/01/rdf-schema#label http://www.w3.org/2004/02/skos/core#prefLabel http://www.w3.org/2004/02/skos/core#altLabel" .
}
我想做这样的事情
SELECT *
WHERE {
?needle luc:labelIndex "title" ;
luc:predicate ?predicate ;
?predicate ?label .
}
如果存在类似于
luc:predicate
的内容,则可以在匹配值旁边提供实际匹配的谓词。然而,我甚至不确定Lucene是否为谓词编制了索引,启用这样的函数需要这样做。传统的FTS Lucene插件无法有效地做到这一点。但是,该应用程序很容易支持您的用例。下面是一个包含一些模拟数据的示例案例:
样本数据
<urn:a> a <http://www.w3.org/2004/02/skos/core#Concept> ;
<http://purl.org/dc/terms/title> "title";
<http://www.w3.org/2000/01/rdf-schema#label> "label" ;
<http://www.w3.org/2004/02/skos/core#prefLabel> "prefer label";
<http://www.w3.org/2004/02/skos/core#altLabel> "alt label" .
返回匹配的字段和代码段
PREFIX : <http://www.ontotext.com/connectors/lucene#>
PREFIX inst: <http://www.ontotext.com/connectors/lucene/instance#>
SELECT ?entity ?snippetField ?snippetText {
?search a inst:fts ;
:query "label" ;
:entities ?entity .
?entity :snippets _:s .
_:s :snippetField ?snippetField ;
:snippetText ?snippetText .
}
前缀:
前缀inst:
选择?实体?代码段字段?代码段文本{
?搜索仪器:fts;
:查询“标签”;
:实体?实体。
?实体:代码段。
_:s:snippetField?snippetField;
:snippetText?snippetText。
}
其中在投影中:
- ?实体是属性或属性链匹配的RDF资源,即
- ?snippetField是与全文查询匹配的字段名
- ?snippetText是匹配的代码段值
<urn:a> a <http://www.w3.org/2004/02/skos/core#Concept> ;
<http://purl.org/dc/terms/title> "title";
<http://www.w3.org/2000/01/rdf-schema#label> "label" ;
<http://www.w3.org/2004/02/skos/core#prefLabel> "prefer label";
<http://www.w3.org/2004/02/skos/core#altLabel> "alt label" .
PREFIX : <http://www.ontotext.com/connectors/lucene#>
PREFIX inst: <http://www.ontotext.com/connectors/lucene/instance#>
INSERT DATA {
inst:fts :createConnector '''
{
"types": [
"http://www.w3.org/2004/02/skos/core#Concept"
],
"fields": [
{
"fieldName": "label",
"propertyChain": [
"http://www.w3.org/2000/01/rdf-schema#label"
]
},
{
"fieldName": "prefLabel",
"propertyChain": [
"http://www.w3.org/2004/02/skos/core#prefLabel"
]
},
{
"fieldName": "altLabel",
"propertyChain": [
"http://www.w3.org/2004/02/skos/core#altLabel"
]
}
]
}
''' .
}
PREFIX : <http://www.ontotext.com/connectors/lucene#>
PREFIX inst: <http://www.ontotext.com/connectors/lucene/instance#>
SELECT ?entity ?snippetField ?snippetText {
?search a inst:fts ;
:query "label" ;
:entities ?entity .
?entity :snippets _:s .
_:s :snippetField ?snippetField ;
:snippetText ?snippetText .
}