Plus, you would have to write additional code in the middle tier to map the relational data to an ObjectdataModel or an XML data Model.
另外,必须在中间层中编写更多代码,将关系数据映射到对象数据模型或XML数据模型。
2
A new spatial database based on region and objectdatamodel is designed. The database could dispose many data sources. It provides application interfaces and has some flexibility.