RDF 容器学习笔记

什么是RDF容器？

RDF容器是一种可以将多个RDF三元组存储在一个单一资源中的方法。这些三元组可以作为被包含在容器中的项目来访问。常见的RDF容器有三种：Bag、Sequence和Alt。

• Bag: 无序的集合，允许重复值。
• Sequence: 有序的列表，允许重复值。
• Alt: 有序的列表，不允许重复值。

RDF容器的语法

Bag语法

Copy Code
[ rdf:_1 ex:name "John" ] .
[ rdf:_2 ex:name "Lucy" ] .
[ rdf:_3 ex:name "Tom" ] .

ex:people rdf:type rdf:Bag ;
         rdf:_1 [ ex:name "John" ] ;
         rdf:_2 [ ex:name "Lucy" ] ;
         rdf:_3 [ ex:name "Tom" ] .

Sequence语法

Copy Code
[ rdf:_1 ex:name "John" ] .
[ rdf:_2 ex:name "Lucy" ] .
[ rdf:_3 ex:name "Tom" ] .

ex:people rdf:type rdf:Seq ;
         rdf:_1 [ ex:name "John" ] ;
         rdf:_2 [ ex:name "Lucy" ] ;
         rdf:_3 [ ex:name "Tom" ] .

Alt语法

Copy Code
[ rdf:_1 ex:name "John" ] .
[ rdf:_2 ex:name "Lucy" ] .
[ rdf:_3 ex:name "Tom" ] .

ex:people rdf:type rdf:Alt ;
         rdf:_1 [ ex:name "John" ] ;
         rdf:_2 [ ex:name "Lucy" ] ;
         rdf:_3 [ ex:name "Tom" ] .

RDF容器的实例

考虑这样一个场景：我们需要存储一部电影的演员名单。看起来，RDF容器是个不错的选择。

Bag实例

Copy Code
[ rdf:_1 ex:actor "Tom Cruise" ] .
[ rdf:_2 ex:actor "Emily Blunt" ] .
[ rdf:_3 ex:actor "Brendan Gleeson" ] .

ex:movie ex:title "Edge of Tomorrow" ;
         ex:actors rdf:type rdf:Bag ;
                  rdf:_1 [ ex:actor "Tom Cruise" ] ;
                  rdf:_2 [ ex:actor "Emily Blunt" ] ;
                  rdf:_3 [ ex:actor "Brendan Gleeson" ] .

Sequence实例

Copy Code
[ rdf:_1 ex:actor "Tom Cruise" ] .
[ rdf:_2 ex:actor "Emily Blunt" ] .
[ rdf:_3 ex:actor "Brendan Gleeson" ] .

ex:movie ex:title "Edge of Tomorrow" ;
         ex:actors rdf:type rdf:Seq ;
                  rdf:_1 [ ex:actor "Tom Cruise" ] ;
                  rdf:_2 [ ex:actor "Emily Blunt" ] ;
                  rdf:_3 [ ex:actor "Brendan Gleeson" ] .

Alt实例

Copy Code
[ rdf:_1 ex:actor "Tom Cruise" ] .
[ rdf:_2 ex:actor "Emily Blunt" ] .
[ rdf:_3 ex:actor "Brendan Gleeson" ] .

ex:movie ex:title "Edge of Tomorrow" ;
         ex:actors rdf:type rdf:Alt ;
                  rdf:_1 [ ex:actor "Tom Cruise" ] ;
                  rdf:_2 [ ex:actor "Emily Blunt" ] ;
                  rdf:_3 [ ex:actor "Brendan Gleeson" ] .

以上实例展示了如何使用RDF容器来存储电影演员名单，Bag、Sequence和Alt容器分别表示了无序列表、有序列表和可选列表的不同特点。