1.You can switch to real name of attributies in teamcenter option in genral section.
2. Look at dataset properties on type atribute.
3. Look on a datasets in BMIDE.
I doubt if you can get the list directly from RAC (even with real property name setting switched on).
Summary Stylesheet --> Audit log tab --> General Logs --> object_type shows dataset internal name when you select a dataset in the left pane.
Your Teamcenter administrator should be able to pull out a list of dataset internal names for you to use.
Ask your DBA to run this query for you..
select ptype_name from pimantype where PTYPE_CLASS='Dataset'
This should give you all the dataset names if you have not changed the storage class of your custom dataset types.