The Dataset Structure Contents panel gives the user an idea of the internal structure of a DataSet. Every dataset contain at least one model. Each model has a spatial component and an attribute component. Every object that belongs to a certain model has the same spatial type (area, line, point or image) and the same attributes.

Each spatial datatype (ovf, shp, etc…) has more or less the same building blocks but the interpretation and the handling can be different. An ovf datatype, for example can contain more than one model with each a different spatial type. The shp datatype can contain just one model.

Navigate to the Data Structure content by using the Dataset Context Menu.
Choose Dataset properties… and click on the tab contents.

The structure of the model(s) from the active dataset is visualized in the left part of the Data Structure content tab.
The right pane changes according to the selection one has made in the dropdownlist on top of the pane. One can find tools to manipulate, rename and add functionalities to the dataset structure.