A brief explanation of the Feature Dictionary is provided here. However, if you wish to use the Feature Dictionary you should open a workbench like Equipment Arrangement. Detailed documentation is also included in the user guides for those products.
The feature dictionary editor allows you to create delete and manage object classes. Object classes are classifications under which you create various objects, like components, for storing in the catalog. You may, for instance, want to have several object classes under valve_function, one of them being check_valve_function, and create various types of check valves under the class. After adding the object classes to the feature dictionary they must also be added to the Function Physical Mapping tables in order to become available in the Class Browser during parts placement.
In addition to that documentation, you may want to learn how to define class names in a CATfct file.
Also refer to Understanding Project Resource Management.
If you choose to delete the sample CATfct file provided with this application and create a new one then any resource that uses attributes or subclasses will be unusable. You will need to create a new parts catalog, for instance, and add new parts in it.
You will not have this problem if you use the sample CATfct file to add classes to. You will learn more about these in this section.