initially defined meaning in English

初值定义的

You can only add tables and columns from a secondary data source after you have initially defined the data source view
查询。创建数据源视图后，可使用数据源设计器添加表。
You cannot add tables or views from multiple data sources when you are initially defining the data source view using the dimension wizard
若想引用多个数据源，则在向导中指定的主数据源必须支持
Connections to external data sources are initially defined in the report and then managed independently of the report after the report is published
与外部数据源的连接最初是在在报表中定义的，在发布报表之后，可以独立于报表对该连接进行管理。