Create identifiers that you can use to distinguish between entities, for example, Employer Identification Numbers (EIN).

1. In Dev Studio, create a class that inherits from the PegaPS-Data-Identifier class, for example, PegaPS-Data-Identifier-EIN.

   For more information about creating classes, see Creating a class.

2. Create a section for the identifier in the new class. Use the IDNumber section in the PegaPS-Data-Identifier-Passport class as a model.

   For more information about creating sections, see Sections - Completing the Create or Save As form.

3. Create a property for the identifier and drag it into the new section. Use the IDNumber property in the PegaPS-Data-Identifier-Passport class as a model.

   For more information about creating properties, see Properties - Completing the Create, Save As, or Specialization form.

4. Map the new class to the new identifier by performing the following actions:

   1. In the Explorer panel, click App. In the search field, enter the name of the class where you intend to use the new identifier, such as PegaPS-Data-Entity-Business or PegaPS-Data-Entity-Person.

   2. Click Data ModelData TransformpySetFieldDefaults.

   3. Add a step for updating the new class and apply the CreatePage data transform rule. See the Image initialization step for reference.

      For more information about adding steps, see Data Transform form - Completing the Definition tab.