在 SPARQL 查询中遵循命名空间

Question

给定这个数据结构

@prefix core <http://www.w3.org/2004/02/skos/core#> 
<http://localhost/myvocab/1> core#notation 1 .
<http://localhost/myvocab/1> <http://www.w3.org/2006/time#inDateTime> <http://localhost/myvocab/item1#DateDescription> .

<http://localhost/myvocab/item1#DateDescription> <http://www.w3.org/2006/time#year>  2016 ;
            <http://www.w3.org/2006/time#month>  "June"

如果我运行

select * where {?s ?p ?o . 
                    <http://www.w3.org/2004/02/skos/core#notation> 1 . }

然后只有前 2 个三元组（:hasID 和 :hasTime）被 returned。是否也有一个 sparql 查询（最好不要使用正则表达式过滤器来匹配 id）到 return 来自子名称空间的所有三元组？

我希望我能取得类似于

的结果

-------------------------------------------------------------------------------------------------------------------------------------------------------
| s                                                | p                                              | o                                               |
=======================================================================================================================================================
| <http://localhost/myvocab/item1>                 | <http://www.w3.org/2006/time#inDateTime>       | <http://localhost/myvocab/item1#DateDescription |
| <http://localhost/myvocab/item1>                 | <http://www.w3.org/2004/02/skos/core#notation> | 1                                               |
| <http://localhost/myvocab/item1#DateDescription> | <http://www.w3.org/2006/time#month>            | "June"                                          |
| <http://localhost/myvocab/item1#DateDescription> | <http://www.w3.org/2006/time#year>             | 2016                                            |
-------------------------------------------------------------------------------------------------------------------------------------------------------

Answer 1

如果您提供我们可以实际加载的数据并且属性您尝试过的形成的查询，这总是有帮助的。您显示的数据实际上不合法，您提供的查询也不合法。下面是一些实际可加载的示例数据：

@prefix core: <http://www.w3.org/2004/02/skos/core#> 

<http://localhost/myvocab/1> core:notation 1 ;
                             <http://www.w3.org/2006/time#inDateTime> <http://localhost/myvocab/item1#DateDescription> .

<http://localhost/myvocab/item1#DateDescription> <http://www.w3.org/2006/time#year> 2016 ;
                                                 <http://www.w3.org/2006/time#month>  "June"

如果我理解你，你也想遵循 :item1_DateTime 对象的属性。您可以使用跟随 :item1 的属性和值等的属性路径来执行此操作。在此查询中，我使用 (:|!:) 作为通配符，因为每个属性要么是 : 要么不是吨。末尾的 * 表示跟随任意长度的路径。

prefix core: <http://www.w3.org/2004/02/skos/core#>

select ?s ?p ?o where {
  ?s_ core:notation 1 ;
      (<>|!<>)* ?s .
  ?s ?p ?o .
}

--------------------------------------------------------------------------------------------------------------------------------------------------
| s                                                | p                                        | o                                                |
==================================================================================================================================================
| <http://localhost/myvocab/1>                     | <http://www.w3.org/2006/time#inDateTime> | <http://localhost/myvocab/item1#DateDescription> |
| <http://localhost/myvocab/1>                     | core:notation                            | 1                                                |
| <http://localhost/myvocab/item1#DateDescription> | <http://www.w3.org/2006/time#month>      | "June"                                           |
| <http://localhost/myvocab/item1#DateDescription> | <http://www.w3.org/2006/time#year>       | 2016                                             |
--------------------------------------------------------------------------------------------------------------------------------------------------

在 SPARQL 查询中遵循命名空间

Following namespaces in SPARQL query

sparql