Task Model in Data Exchange System Based on Meta Data
基于元数据的数据交换系统任务模型

ETL containing three parts of extracting ,transforming, loading is one core of building the Data Warehouse. For the sake of heterogeneous data source integration, this paper puts forwards a model of the data exchange system based on ETL Meta. Further, a task designing model and a task designing model are raised in in this paper. Last, the article recommends a main algorithm and the designing model in the data exchange system.