E-speak is an open software platform designed for supporting the description, registration, and discovery of e-services, the ability to compose multiple e-services into higher-level e-services, the ability to negotiate among e-services, and the ability to manage e-service interactions. XAML will enhance the e-speak platform for the coordination and processing of online business transactions involving e-services. XAML provides e-speak with a standard set of XML message formats and interaction models for e-services to use to provide business level transactions that span across companies over the Internet.