The data mart interface makes it possible to update data from one data target into another.

You have the following options:

• Data exchange of several BW Systems: The data-delivering system is then referred to as the source BW, the data-receiving system as the target BW. The individual Business Information Warehouses arranged in such a way are called Data Marts. In this way, the data targets for the source BW system are drawn up as source systems.

• Data exchange between BW Systems and APO Systems

• Data distribution within a BW System (Myself connection)

• they save a subset of the data for a Data Warehouse in another database, and wherever possible in a different location.

• they are smaller units of a Data Warehouse

• they are stored as intentionally redundant segments of the (logical, global) overall system (Data Warehouse).

A Business Information Warehouse represents a source system for another Business Information Warehouse by:

• offering InfoObjects and InfoSources in the form of Metadata

• retrieving extractors, transaction and master data, as well as texts and hierarchies

In this way, the data targets for the source BW are presented as DataSources for the target BW. The transaction data is extracted from the fact tables of the relevant data target for the source BW. In the target BW you can also access the master data of all the InfoObjects that are contained in the data target. You can also create export DataSources for InfoObjects out of this context.

• the InfoCube is activated
• the name of the InfoCube is at least one character shorter than the maximum length of a name, since the DataSource name is made up of the InfoCube name and a prefix.