This helps to identify and locate a model object if you know the category or type of the object.
如果您知道对象的分类或类型，它可以帮助确定并定位模型对象。
The Lifecycle category groups the features related to the history and current state of this learning object and those who have affected this learning object during its evolution.
生命期（Lifecycle）范畴包含与该学习对象的历史和当前状态有关的特性，以及在其演化过程中发挥作用的那些特性。
The Educational category groups the educational and pedagogic characteristics of the learning object.
教育（Educational）范畴包括学习对象的教育性和教育学特征。
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