Namespaces for BW Objects 
The following Namespaces are generally available for BW objects:
SAP-delivery (Business Content) namespace:
Objects beginning with 0
Generated objects in the DDIC beginning with /BI0/
ExampleInfoCube 0SALES, fact table /BI0/FSALES
End of the example.
Customer namespace:
Objects beginning with A-Z
Generated objects in the DDIC beginning with /BIC/
ExampleInfoCube SALES, fact table /BIC/FSALES
End of the example.
Partner-specific namespace and customer-specific namespace:
Object begins with /XYZ/ (example)
Special SAP namespaces for generated objects:
The prefixes 1, 2, 3, 4, 6, 7, 8 are required in BW for DataSources and InfoSources in special SAP applications.
The prefix 9A is required for the SAP APO application.
When you create your own objects, therefore, give them technical names that start with a letter. The maximum permitted length for a name varies from object to object. Typically, 9 to 11 letters can be used.
You can transfer from the Business Content version any Business Content objects that start with 0 and modify them to meet your requirements. If you change an InfoObject in the SAP namespace, your modified InfoObject is not overwritten immediately when you install a new release, and your changes remain in place for the time being.
You also have the option of enhancing the SAP Business Content without a modification. There is a partner namespace and a customer namespace available for you to do this. You have to request these namespaces specially. Once you have prepared the partner namespace and the customer namespace (for example, /XYZ/) you are able to create BW objects that start with the prefix /XYZ/. You use a forward slash "/" to avoid overlaps with SAP Business Content and customer-specific objects. For more information, see Using the Namespace for Developing BW Objects.
See also: