How to fetch BPM history

Hello Everyone,

We are working on CE7.2.

I can see the tasks claimed  event for all tasks  in  BPM "manage processes"  in nwa.

I would like to fetch this data for display through custom WDJ application.

I checked the following link and found

http://www.sdn.sap.com/irj/scn/go/portal/prtroot/docs/library/uuid/109b805f-2e28-2d10-ed9c-94eea0e8ae5c?quicklink=index&overridelayout=true ( Pg 14)

that BPM history data is changed to XML and stored as BLOB datatype in DB  and to read data the BLOB data is  reinstantiated to data objects in memory.

I am aware that 7.3 offers API to fetch BPM data.

Unfortunately we are still running on 7.2.

Can somebody please let me know in which DB table i can find this XML stored as blob?

and if the same can be made available through WDJ.

Thanks

Pooja M