Electronic commerce applications (e-commerce) need connecting technologies to support the external, agreed-upon or flexible business processes. This requires a specification of these types of business processes with a business interactions and connectionoriented perspective in order to compose them from the existing assets of the enterprise, partners, and suppliers. This work advocates a conceptualization of the business interactions perspective (of a business modeling) as an approach to specify: (1) ness processes as abstract (virtual) entities implemented as dynamic connections among actual entities that are the business functions and objects (as implemented in the inter-organizational information systems), and (2) the requirements for a connecting technology, that is Web services, to make it an enabler of two categories of e-commerce interactions: B2C and B2B. oach consists of: (1) abstracting, specifying (in terms of activities), and categorizing the business interactions into ent...