Since there is no standard meta-model of a relational schema, and again for the sake of simplicity, we have decided to define our own meta-model based on EMF, which we'll call SimpleRDB--see Figure 2.
由于没有关联计划的标准通用模型，而且还是为了简单起见，我们决定基于EMF来定义我们自己的通用模型，我们称它为SimpleRDB见图2。
The meta data is used to create a database schema to capture and query events.
元数据用来创建一个数据库模式，从而捕捉和查询事件。
This XML schema, together with meta data pertaining to an Axis service, is given to the Axis2 engine.
此 XML 模式连同与 Axis 服务相关的元数据将被传递给 Axis2 引擎。
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