What does "create subwiki" do on Oracle

Hi all

I thought it would be a good idea to split our wiki into different subwikis. Trying it on our installation today resulted in a similar picture as described here: Unable to create subwiki on Oracle (ORA-01031). Reading the docs, I came across this part:

grant connect to xwiki;
grant resource to xwiki;
grant dba to xwiki;

The first two are clear and ok, but the dba grant is not granted in our DB, as it’s a shared environment.

Could someone quickly elaborate what “create subwiki” does, database-wise?

Thanks in advance

André