Furthermore, RIST provides a unified index on both content and structure of the XML documents, hence it has a performance advantage over methods indexing either content or structure.

• 另外，RIST还在XML文档的内容和结构上提供了一个统一的索引，所以它的一个很明显的优势就是克服了仅仅根据内容或结构建立索引的弊端。