For all these reasons, schema evolution is a very important topic that has been researched in the context of relational, object-oriented, and XML databases.
由于上述这些原因，模式演化作为一项重要课题需要在关系、面向对象和XML数据库环境中加以研究。
For all these reasons, schema evolution is a very important topic that has been researched in the context of relational, object-oriented, and XML databases.
由于上述这些原因，模式演化作为一项重要课题需要在关系、面向对象和XML数据库环境中加以研究。
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