To effectively support XML query, especially the structural query, various encoding schemes have been proposed.

为了有效支持XML查询，特别是结构查询，目前已经提出了XML数据的各种编码方案。

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XML query includes content query and structural query. The query condition can be represented as a simple path expression (SPE) or a regular path expression (RPE).

XML查询包含内容查询和结构查询，其查询条件可表示为简单路径表达式(SPE)和正则路径路径表达式(RPE)。

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XML query includes content query and structural query. The query condition can be represented as a simple path expression (SPE) or a regular path expression (RPE).

XML查询包含内容查询和结构查询，其查询条件可表示为简单路径表达式(SPE)和正则路径路径表达式(RPE)。

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