A relational database is required to support the XML data type to store an XML document. Not all databases support the XML data type.
需要一个关系数据库来支持XML数据类型存储XML文档，不是所有的数据库都支持XML数据类型。
Up until now, powerful wiki, blog, discussion forum and document-management software have worked around relational databases to make them store document-oriented data as efficiently as possible.
到目前为止，强大的wiki、博客、讨论论坛和文档管理软件都致力于改善关系数据库，让它们能够更高效地储存文档形式的数据。
Up until now, powerful wiki, blog, discussion forum and document-management software have worked around relational databases to make them store document-oriented data as efficiently as possible.
到目前为止，强大的wiki、博客、讨论论坛和文档管理软件都致力于改善关系数据库，让它们能够更高效地储存文档形式的数据。
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