Read data from PDS for comparision with R/3 data

Does anybody have any idea how to read the data from PDS ? I am required to prepare a report which allows the super user to check all PDS for all location n products(namely AGI code & vendor no.). It uses the transaction /SAPAPO/CURTO_SIMU. The output of the report is to be used for comparision between PDS master data in APO vs. the master data in R/3.

Any suggestions how i should proceed & if any FMs or BAPIs r available for reading PDS data??

Thanks in advance.