CHAPTER Organizing the Model with Packages 6 This chapter addresses the topic of model organization and describes the organizational concepts provided by SysML: models, packages, and views. In SysML, the fundamental unit of model organization is the package. Packages and their contents are shown on a package diagram. Packages are both containers and namespaces, two fundamental concepts in SysML. 6.1 OVERVIEW A SysML model of a complex system can contain thousands or even millions of model elements. In SysML, each model element is contained within a single container that is called its owner or parent. Contained elements are often called the child elements. When a container is deleted or copied, its child elements are also deleted or copied. Some child elements can also be containers, which leads to