When you develop your content in the Developer, you organize the content into a hierarchical outline of modules and sections. Along with containing content items such as topics and assessments, the sections themselves may contain content in the form of a section concept. Both SCORM and AICC, however, require that each item in the tree be either a content item (SCO or AU) or have children, but not both. When publishing for LMS deployment, section concepts are published as the first child of the section. In other words, a section with a concept containing two topics as children appears in the LMS as having three children; that is, the concept followed by the two topics. The section concept is marked complete as soon as it is selected from the LMS.