RDF 容器元素

RDF 容器用于描述一组事物。举个例子，把某本书的作者列在一起。

تماکنوکو RDF یانگا ھایوکو تالاروکو یرا تالاروکو <Bag>، <Seq> ھایوکو <Alt> یرا.

<rdf:Bag> 元素

<rdf:Bag> 元素用于描述一个规定为无序的值的列表。

<rdf:Bag> 元素可包含重复的值。

Example

<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" 
xmlns:cd="http://www.recshop.fake/cd#">
<rdf:Description
 rdf:about="http://www.recshop.fake/cd/Beatles">
 <cd:artist>
   <rdf:Bag>
     <rdf:li>John</rdf:li>
     <rdf:li>Paul</rdf:li>
     <rdf:li>George</rdf:li>
     <rdf:li>Ringo</rdf:li>
   </rdf:Bag>
  </cd:artist>
</rdf:Description>
</rdf:RDF>

<rdf:Seq> 元素

<rdf:Seq> 元素用于描述一个规定为有序的值的列表（比如一个字母顺序的排序）。

<rdf:Bag> 元素可包含重复的值。

Example

<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" 
xmlns:cd="http://www.recshop.fake/cd#">
<rdf:Description
 rdf:about="http://www.recshop.fake/cd/Beatles">
 <cd:artist>	
   <rdf:Seq>
     <rdf:li>George</rdf:li>
     <rdf:li>John</rdf:li>
     <rdf:li>Paul</rdf:li>
     <rdf:li>Ringo</rdf:li>
   </rdf:Seq>
  </cd:artist>
</rdf:Description>
</rdf:RDF>

<rdf:Alt> element

<rdf:Alt> element is used for a list of alternative values (the user can only choose one of these values).

Example

<?xml version="1.0"?>
<rdf:RDF
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" 
xmlns:cd="http://www.recshop.fake/cd#">
<rdf:Description
 rdf:about="http://www.recshop.fake/cd/Beatles">
 <cd:format>	
   </rdf:Alt>
     <rdf:li>CD</rdf:li>
     <rdf:li>Record</rdf:li>
     <rdf:li>Tape</rdf:li>
   </rdf:Alt>
  </cd:format>
</rdf:Description>
</rdf:RDF>

RDF Terms

In the above example, we have discussed 'value lists' when describing container elements. In RDF, these 'value lists' are called members (members).

Therefore, we can say that:

  • A container is a resource that contains things
  • The things included are called members (they cannot be called 'value lists').