Present Educational Modelling Languages are used to formally specify abstract learning scenarios in a machine-interpretable format. Current tooling does not provide teachers/designers with some graphical facilities to help them in reusing existent scenarios. They need human-readable representations. This paper discusses the UML4LD experimental research work in relation to the graphical representation of abstract learning scenarios. We discuss the benefits teachers/designers can expect to reach as well as some scientific and/or technical obstacles researchers have to overcome to realize such models transformation. Our experiment concretely concerns the automatic generation of UML activity diagrams from IMS-LD learning scenarios. (Contains 1 table and 6 figures.)