The intelligent learning systems provide direct customized instruction to the learners without the intervention of human tutors on the basis of Semantic Web resources. Principal roles use ontologies as instruments for modeling learning processes, learners, learning disciplines and resources. This paper examines the variety, relationships, and conceptualizations of ontologies used in intelligent learning systems. The domain and application of ontologies assist in the building of learning content (courseware) and in the process of knowledge acquisition (learning session). In this paper, the conceptualization of the domain ontologies is presented by the upper levels of its taxonomies, a method and an algorithm intended for the generation of application ontologies of structural learning objects, that is, curriculum, syllabus, and lesson plan, are developed. Examples of curriculum and syllabus application ontologies are given. (Contains 10 figures and 4 endnotes.)