Creating and Maintaining a Subset Definition › Create and Modify a Subset Definition › Create a Subset Definition

Create a Subset Definition

Follow these steps:

1. Log on to the encyclopedia via the Encyclopedia Client.
2. Name the new subset. Specify the model and subset names.
   1. From the main window, select Subset.
   2. From the Encyclopedia Subset Selection window, select Actions, List Models.
   3. From the Model List, highlight the model from which the subset is to be created and click Open.
   4. Enter the name for the new subset and click New.
3. Select new objects. Select the scoping objects that are to compose your subset.
   1. From the Subset Selected Object List, select Actions, Select New Objects.
   2. From the Object Type List, select the types of objects you want in the subset. You can select all the object types and click List or you can select one at a time. The following assumes you have selected all at once, where “all” can include object types for high‑level objects you plan to expand for selection of subordinate scoping objects.

      Note: For more information on the scoping object types in the order that they appear, see the Scoping Object Types section in the “About Subsetting” chapter.

   3. From the Subset Object Occurrence List of the displayed selected object type, select the objects you want in this subset and click Add.

   If you want to select a subordinate object of a displayed object, highlight the displayed object and click Expand to display the Subset Expanded Object Occurrence List. Continue selection and, optionally, expansion; click Add to add objects you highlight. Click Continue to continue selection from the list from which you selected Expand.

   Avoid duplicate scoping. That is, expand only objects that you are not selecting for inclusion in the subset.

   If you do not want to select a subordinate object of one of the displayed objects, click Continue to display the next object type you selected until you have selected occurrences of the last selected object type. Then click Cancel twice to display the Subset Selected Object List containing all selected objects with default protection and expansion.

4. Modify the subset definition. Tailor the subset definition to the task requirements.
   1. Change or Verify Subset Type.

      If creating a subset for testing, change the default type, Design, to either Unit Test or System Test. Otherwise, accept the default.

   2. Remove Unnecessary Objects.

      For any displayed object that is not required by your task, highlight and select Remove. For recommendations, compare the displayed list of objects with the Task Table for the task you plan to perform with this subset.

   3. Change Object Protection.

      For each object that requires a protection level different from that displayed, make the needed change. To make a change, highlight the object and select Actions, Modify then Protection/Expansion. Always select the lowest possible protection level that is sufficient for successful completion of your task.

      Protection options, from high to low, are as follows:

      • D-(Delete) Required to delete the object.

        (Prevents others who check out after you from getting object with more than Read protection.)

      • M-(Modify) Required to change the object or add components to it.

        (Prevents others who check out after you from getting object with more than Access protection).

      • A-(Access) Sufficient to reference or build an association to object.
      • R-(Read) Sufficient to read the object.
   4. Change Object Expansion. For each object that requires an expansion level different from that displayed, make the needed change. For recommendations, compare the displayed expansion for each object with the expansion recommended in the Task Table for your task. To make a change, highlight the object and select Actions, Modify Protection/Expansion. Always select the lowest expansion level that brings in all the objects you need to complete your task. To compare expansion levels, see the expansion table for the object. Expansion options are as follows:
      • F-(Full) Includes the most objects of the options.
      • D-(Default) Includes fewer objects than Full, but more than Short.
      • S-(Short) Includes the fewest objects of the options.
5. Confirm the subset definition. When you have reviewed the subset definition and made all required changes, click Actions, Save and Exit.