接下来我们必须添加一个计划(schema)区域到模型中以使数据库架构师可以跟踪数据建模的工作。

Later we had to add a schema area to the model to track data modeling efforts by the database architect.

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我们的程序设定了数据库跟踪周期，周期短可短到一小时，长可长到一星期，因市场走势而定。

The database tracking time period is set in our program, and could be as short as one hour or as long as one week, based on the market move.

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