它是一种元标注语言，提供一种描述结构数据的格式。
It is a mata markup language, it provide a format to describe structure data.
通过引入元数据的标注完成对场景的标注，实现用户的语义查询。
The semantic retrieval of news video is implemented by the annotation of scene through metadata annotation.
通过引入元数据的标注完成对场景的标注，实现用户的语义查询。
The semantic retrieval of news video is implemented by the annotation of scene through metadata annotation.
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