Marklogic Cts:用sparql搜索

Question

在marklogic中,三元组可以嵌入到现有文档中.我如何使用cts搜索查询来返回文档.文档的一个例子可以是

<ContentVersion>
  <Name>Testing</Name>
  <Status>Approved</Status>
  <sem:triples xmlns:sem="http://marklogic.com/semantics">
   <sem:triple>
      <sem:subject>http://mycontent/content/Testing</sem:subject>
      <sem:predicate>is</sem:predicate>
      <sem:object>Approved</sem:object>
 </sem:triple>
</sem:triples>
</ContentVersion>

如果尝试以下查询

let $query := cts:word-query('Testing',"case-insensitive")
let $sparql := "PREFIX cts: <http://marklogic.com/cts#>
                DESCRIBE ?s 
                WHERE{ 
                   ?s ?p ?o .
                   FILTER cts:contains(?o, cts:word-query('Testing')) 
                }"
let $results := sem:sparql($sparql,(),("default-graph=magician"),($query))  
return(sem:rdf-serialize($results,'rdfxml'))

我得到一个空洞的结果.关于为什么没有归还的任何想法？我正在使用MarkLogic 7

Answer 1

cts:contains专注于？o,仅包含'Approved'.这就是为什么sem:sparql没有返回结果,不是因为你使用cts查询错误的方式.

(更新..)

为了确认方法是有效的,我尝试了这个,它适用于我:

xquery version "1.0-ml";

let $xml := <ContentVersion>
  <Name>Testing</Name>
  <Status>Approved</Status>
  <sem:triples xmlns:sem="http://marklogic.com/semantics">
   <sem:triple>
      <sem:subject>http://mycontent/content/Testing</sem:subject>
      <sem:predicate>is</sem:predicate>
      <sem:object>Approved</sem:object>
 </sem:triple>
</sem:triples>
</ContentVersion>
return xdmp:document-insert("/test.xml", $xml, (), "magician")
;

let $query := cts:word-query('Testing',"case-insensitive")
let $sparql := "PREFIX cts: <http://marklogic.com/cts#>
                DESCRIBE ?s 
                WHERE{ 
                   ?s ?p ?o .
                   FILTER cts:contains(?o, cts:word-query('Approved')) 
                }"
let $results := sem:sparql($sparql,(),("default-graph=magician"),($query))  
return $results

使用QC针对任何启用了三重索引的数据库运行此操作.

你确定你用'魔术师'集合插入你的文档吗？这就是使用MarkLogic在特定图形中嵌入三元组的方法.

HTH!