XBASE is a prototype system of document database system based on semantic information.

XBASE语义文档数据库系统是一种基于语义信息的文档数据库原型系统。

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When a document enters the system, it is stored in the file server and indexed in the DB2 database.

当一个文档进入系统时，它存储在文件服务器上并在DB 2数据库中编制索引。

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Apache CouchDB is an open source document-oriented database management system that stores data as JSON objects.

Apache CouchDB是一个基于开源文档的数据库管理系统，它将数据存储为JSON对象。

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