The sample application uses a DTD for the XML data format, and it assumes that all the data sources before being processed by XQuery are valid XML documents against the DTD.
该程序对 XML 数据格式使用了一个 DTD，并假定在 XQuery 处理之前所有的数据源都是对该 DTD 有效的 XML 文档。
These documents are kept in the production area where the product is being processed or is staged for the next processing step.
这些文件应保存在材料加工所在地，或进入下道工序之前的材料存放地。
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