Rather than define a class in terms of the properties of its instances, the RDF vocabulary description language describes properties in terms of which classes of resource that the properties apply to.

它不使用实例的属性来定义类，而是使用RDF词汇描述语言采用资源类(属性所适用的类)的术语来描述属性。

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There are two main W3C Standards that are used to defined such models: Resource Description Framework (RDF) and Web Ontology Language (OWL).

定义这种模型有两种主要的W3C标准：资源描述框架(RDF)和Web本体语言(owl)。

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This tutorial assumes that you are familiar with the concepts of XML, Resource Description Framework (RDF), ontologies, and the Web Ontology Language (OWL).

本教程假设读者熟悉XML的概念、资源描述框架(RDF)、本体和Web本体语言(owl)。

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