The element <scoEntryItem> contains a reference to a data module that comprises the content of a learning event. It also contains LOM information to describe the referenced content. As shown in the example below, the element <scoEntry> can be nested within the element <scoEntryItem> in order to define the hierarchical structure of the course or learning event.A SCO entry can be composed by references to the data modules containing the content that must be included or to sub SCO entry definitions or both. References can be made to any type of content data module within the element <scoEntryItem>.