RDF文档由一些简单的语句组成，每个语句包含三个部分：主语、谓语和宾语(值)。
RDF documents are made up of simple statements that consist of three parts each: the subject, the predicate, and the object (value).
解析器则是识别“这个句子包含一个动词、一个主语、一些形容词和一些代名词”的那一部分。
The parser is the language knowledge that says "this sentence contains a verb, a subject, a few adjectives, and some pronouns."
验证程序的这一部分仍在开发之中，但清单5说明了如何定义宿主语言。
This portion of the validator is still under development, but Listing 5 shows how the host language is defined.
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