Hi Vin,
SAP defines: "Business packages are the delivery unit for portal content running on SAP Enterprise Portal. They contain pre-configured portal content structures that can easily be integrated into an existing portal infrastructure. These content structures should be developed according to the guidelines and requirements that are contained in this document. They specify how you should structure the content elements to maximize reusability of portal content and provide users with an intuitive user interface."
Also see https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/documents/a1-8-4/icc - how to certify portal content - ep-bp.pdf
Hope it helps
Detlev
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