Hi,
You can get this info from sap help.Please use the below help link,in the left had pane expand the data source.
http://help.sap.com/saphelp_nw04/helpdata/en/5d/ac7d8082a27b438b026495593821b1/frameset.htm
find the below links related to PCA,
http://help.sap.com/saphelp_46c/helpdata/en/eb/13768d43c411d1896f0000e8322d00/content.htm
http://help.sap.com/saphelp_40b/helpdata/en/eb/13768d43c411d1896f0000e8322d00/content.htm
http://help.sap.com/saphelp_ides/helpdata/en/c8/3488ebeb0011d1ac1e0000e8a5eb64/content.htm
http://help.sap.com/saphelp_bw33/helpdata/en/42/e77a8e0e2c6346a0be901408be8781/content.htm
Thanks,
Phani.