About extracting data
The load process is composed of two main steps: loading and transformation. The configuration of the load process is done in the Data module.
The Data page, as shown in Figure 3-1, is divided into three areas: Databases, Files, and Options. Databases and Files are places where you define the connections to the data sources. Options is the place where you define a load process. A load process consists of options that determine the way the load process runs, and transactions. A load transaction describes the data mappings between the input data and the tables in the target database. A load process may contain multiple transactions.
Figure 3-1  

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