0BPM* Extractors for Workflow

Hi All

           We are planning to create BI reports on the Purchase requisition workflow for Analytics .

I have found that we do have some standard extractors like 0BPM_LOGHIST, 0BPM_WIHEAD but unfortunately I am not able to find them in our system

in the BI content. Could you please point out to me where and how we can get the standard extractors?

Just to add .. we do not have SRM in our system .

Any help is really appreciated

Thanks in advance

Vinay