Data Groups in Data Manager---Importing PDF

Hi

I am following this scenario

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/c01f54a2-99f1-2a10-5aa5-dcc50870e7f6

In my data manager

I am getting like this DataGroups (0)

I am not getting the ways its mentioned in the Article.

Please refer page 4 and 5. Do I have to create any datagroups in my repository (console) if so How to do ?

Thanks

manian