•RDF uses a flexible graph data model which doesn’t require much systematic design in advance, is easily extensible and seems to fit with the Web idea of decentralised creation and rich interconnections RDF使用灵活的图形数据模型，不需要提前进行系统设计，易于扩展，并且似乎符合分散创建和丰富互连的网络理念
    •RDF graphs are defined by nodes (usually labelled), which are connected by directed (one-way), labelled arcs. RDF图由节点(通常被标记)定义，这些节点由有向(单向)标记弧连接。

    Example

    This is a triple that asserts a fact. The triple has three components, a node that is the Subject 主语, a directed arc that is the Predicate 宾语, and a node that is the Object 谓语. The Predicate _is also somewhat loosely called the _Property and more formally is a binary relation.
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    In the serialisation syntax, Turtle, it is written as a statement terminated by a full stop, “.”, as follows. URIs are enclosed by “< >” angle brackets. The property is also a URI but is written in an abbreviated form (without angle brackets) here.在序列化语法“海龟”中，它被写成以句号“.”结尾的语句，如下所示。URIs用“< >”尖括号括起来。该属性也是一个URI，但在这里是以缩写形式编写的(没有尖括号)。

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