Digital learning resources are becoming increasingly important on the list of learning resources of educational institutions every year. Publishers, distributors and suppliers of electronic learning environments and student administration systems depend on each other for the flawless distribution and access of digital learning resources. The ECK Distribution and Access agreement enables all kinds of services within the educational content chain (ECK). The agreement includes a reference architecture containing relevant concepts, the principles used and a description of the processes, a description of the web services and technical regulations.