]> Interactivity types Instances of this class represent interactivity types. Active Expositive Mixed Undefined Interactivity type Type Predominant mode of learning supported by this learning object. Learning Resource types Instances of this class represent learning resource types. Each such type should be an rdfs:Class that can be used as the value of an rdf:type property. Exercise Simulation Questionnaire Diagram Figure Graph Index Slide Table Narrative Text Exam Experiment Problem Statement Self Assessment Lecture Interactivity levels Instances of this class represent interactivity levels. Very Low Low Medium High Very High Interactivity level The degree of interactivity characterizing this learning object. Semantic Densities Instances of this class represent semantic densities. Very Low Low Medium High Very High Semantic density The degree of conciseness of a learning object. Intended end user role Instances of this class represent intended end user roles. Teacher Author Learner Manager Intended end user role Principal user(s) for which this learning object was designed. Learning Context Instances of this class represent learning contexts. School Higher Education Training Other Learning Context The principal environment within which the learning and use of this learning object is intended to take place. Age Range Instances of this class represent age ranges. Difficulty Instances of this class represent difficulties. Very Easy Easy Medium Difficult Very Difficult Difficulty How hard it is to work through this learning object for the typical target audience. Typical Learning Time Approximate or typical time it takes to work with this learning object for the typical intended target audience. Description Comments on how this learning object is to be used. Educational language The human language used by the typical intended user of this learning object.