The AS4 profile of eDelivery is the AS4 Usage Profile defined by e-SENS based on the AS4 Profile of ebMS 3.0 Version 1.0. OASIS Standard. AS4 itself is based on other standards, in particular on OASIS ebXML Messaging Services Version 3.0: Part 1, Core Features OASIS Standard, which in turn is based on various Web Services specifications.
The Large Scale Pilot e-SENS and the Connecting Europe Facility (CEF), which operationalises services developed in the Large Scale Pilots, have been working closely on the implementation of secure message exchange in several policy domains of the Union, commonly known as eDelivery. To make this a reality, a profile of the AS4 message exchange specification was developed and is now being promoted for adoption by software vendors under the Connecting Europe Facility (CEF).