A few questions about SAP MDM

hi,

my company is preparing now to implement system for corporate reporting. I am wondering if MDM would be useful for this. Reporting tool will be SAP BW.

I have read some documentation on help.sap.com and have some queations:

1. I saw paragraph 'Master Data Objects' and there was only a few objects. Does it mean that MDM supports integration and management of only those objects listed there? Or I can use MDM to map any other master data like e.g. 'product groups' ?

2. Does MDM have its own data repositories or only provides mechanisms to match MD from various systems and sends it back to its clients (or SAP BW)?

3. Does MDM distribute data in XML format or in other way e.g. IDOCs?

Thanks,

Andrzej