RDF resources, attributes, and attribute values ¶

RDF uses Web identifiers to identify things and describes resources by attributes and attribute values.

Interpretation of resources, attributes, and attribute values:

• 资源 Is anything that can have a URI, such as “ https://www.runoob.com//rdf ””

• 属性 Is a resource with a name such as “author” or “homepage”

• 属性值 Is the value of an attribute, such as “David” or “ https://www.runoob.com/ ”” (note that an attribute value can be another resource)

The following RDF document describes the resource “ https://www.runoob.com//rdf ”:

<?xml version="1.0"?>
<RDF>
  <Description about="https://www.runoob.com//rdf">
    <author>Jan Egil Refsnes</author>
    <homepage>https://www.runoob.com/</homepage>
  </Description>
</RDF>

The above is a simplified example. The namespace is ignored.

RDF statement ¶

A combination of resources, attributes, and attribute values can form a 陈述 (called declarative 主体 、 谓语 And 客体 ).

Please take a look at some specific examples of statements to deepen your understanding:

Statement: “The author of https://www.runoob.com//rdf is David.”

• The subject of the statement is: https://www.runoob.com//rdf

• The predicate is: author

• The object is David

Statement: “The homepage of https://www.runoob.com//rdf is https://www.runoob.com/ ”.

• The subject of the statement is: https://www.runoob.com//rdf

• The predicate is: homepage

• The object is https://www.runoob.com/