Sparql Blazegraph全文搜索和总计数
在SPARQL中,我可以执行以下查询,以检索一个查询结果中的字段和总计数:Sparql Blazegraph全文搜索和总计数,sparql,blazegraph,Sparql,Blazegraph,在SPARQL中,我可以执行以下查询,以检索一个查询结果中的字段和总计数: SELECT ?total ?s WHERE { { SELECT (COUNT(?s) AS ?total) WHERE { ?s <https://some/predicate/for/var1> ?var1 ; <https://some/predicate/for/var1> ?var2 F
SELECT ?total ?s
WHERE
{
{ SELECT (COUNT(?s) AS ?total)
WHERE
{ ?s <https://some/predicate/for/var1> ?var1 ;
<https://some/predicate/for/var1> ?var2
FILTER ( ( ?var1 = "something" ) && ( ?var2 = "something2" ) )
}
}
{ SELECT ?s
WHERE
{ ?s <https://some/predicate/for/var1> ?var1 ;
<https://some/predicate/for/var1> ?var2
FILTER ( ( ?var1 = "something" ) && ( ?var2 = "something2" ) )
}
LIMIT 3
}
}
我想为做同样的事情,它可以如下使用的bds:搜索“某物”。
但是,使用与上一个相同的结构组合查询不起作用:
PREFIX bds: <http://www.bigdata.com/rdf/search#>
SELECT ?total ?s ?org
WHERE
{
{ SELECT (COUNT(?s) AS ?total)
WHERE{
?matchedValue
bds:search "something" ;
bds:relevance ?score ;
bds:rank ?rank .
?s ?matchedProperty ?matchedValue
FILTER ( ! isBlank(?s) )
}
}
{ SELECT ?s ?matchedProperty ?score ?rank
WHERE{
?matchedValue
bds:search "something" ;
bds:relevance ?score ;
bds:rank ?rank .
?s ?matchedProperty ?matchedValue
FILTER ( ! isBlank(?s) )
}
LIMIT 10
}
}
前缀bds:
选择“总计”组织
哪里
{
{选择(计数(?s)为总计)
在哪里{
?匹配值
搜索“某物”;
bds:相关性?得分;
等级?等级。
?s?匹配属性?匹配值
过滤器(!isBlank(?s))
}
}
{选择?s?匹配属性?分数?排名
在哪里{
?匹配值
搜索“某物”;
bds:相关性?得分;
等级?等级。
?s?匹配属性?匹配值
过滤器(!isBlank(?s))
}
限制10
}
}
即使如此,这些子查询也会分别返回正确的结果。正如@stanislav kralin所正确提到的,您必须明确使用SERVICE子句:
PREFIX bds: <http://www.bigdata.com/rdf/search#>
SELECT ?total ?s ?org
WHERE
{
{ SELECT (COUNT(?s) AS ?total)
WHERE {
SERVICE <http://www.bigdata.com/rdf/search#search> {
?matchedValue
bds:search "something" ;
bds:relevance ?score ;
bds:rank ?rank .
}
?s ?matchedProperty ?matchedValue
FILTER ( ! isBlank(?s) )
}
}
{ SELECT ?s ?matchedProperty ?score ?rank
WHERE {
SERVICE <http://www.bigdata.com/rdf/search#search> {
?matchedValue
bds:search "something" ;
bds:relevance ?score ;
bds:rank ?rank .
}
?s ?matchedProperty ?matchedValue
FILTER ( ! isBlank(?s) )
}
LIMIT 10
}
}
前缀bds:
选择“总计”组织
哪里
{
{选择(计数(?s)为总计)
在哪里{
服务{
?匹配值
搜索“某物”;
bds:相关性?得分;
等级?等级。
}
?s?匹配属性?匹配值
过滤器(!isBlank(?s))
}
}
{选择?s?匹配属性?分数?排名
在哪里{
服务{
?匹配值
搜索“某物”;
bds:相关性?得分;
等级?等级。
}
?s?匹配属性?匹配值
过滤器(!isBlank(?s))
}
限制10
}
}
Maybe:“全文搜索只能在子查询中使用显式服务调用。”
PREFIX bds: <http://www.bigdata.com/rdf/search#>
SELECT ?total ?s ?org
WHERE
{
{ SELECT (COUNT(?s) AS ?total)
WHERE {
SERVICE <http://www.bigdata.com/rdf/search#search> {
?matchedValue
bds:search "something" ;
bds:relevance ?score ;
bds:rank ?rank .
}
?s ?matchedProperty ?matchedValue
FILTER ( ! isBlank(?s) )
}
}
{ SELECT ?s ?matchedProperty ?score ?rank
WHERE {
SERVICE <http://www.bigdata.com/rdf/search#search> {
?matchedValue
bds:search "something" ;
bds:relevance ?score ;
bds:rank ?rank .
}
?s ?matchedProperty ?matchedValue
FILTER ( ! isBlank(?s) )
}
LIMIT 10
}
}