An XML page is as much a database as a document, because every field that can be identified, or parsed, can contain specific data that other applications can reliably identify, extract and transform. xml页面既像数据库、又像文档，因为每个字段是可以识别的或可以解析的，它包含了其他应用程序能可靠识别、提取和转换的具体数据。
