Below are my notes on Adempeire / iDempiere account postings
Purchase Order: No Posting unless you enable SO/PO Commitment posting
Material Receipt
Product > Accounting: Product Asset (DR)
Business Partner Group > Accounting: Not-invoiced Receipts (CR)
Invoice (Vendor)
Product > Accounting: Inventory Clearing (DR)
Business Partner > Vendor Accounting: Vendor Liability (CR)
Instead of repeating what's in the wiki, I'm just resharing the documentation.
http://www.adempiere.com/ADempiere_Accounting
It was a little bit cluttered, but just read it through, you'll be able to understand it. Based on my initial testing last Dec 2014 for modules AR and AP, posting still looks okay and what's being used by iDempiere 2.1 :)
