From the SAP Terminology Guide:
A Business Process Platform is "a composition platform that combines infrastructure technology with preconfigured software modules to support business processes. SAP NetWeaver is evolving into a business process platform. That is, SAP is extending the technical capabilities of SAP NetWeaver by enriching it with process components that provide highly reusable and fundamental business-object functionality through enterprise services." (Source: Gartner Group.) Synonyms include: applistructure.