Create your first metamodel

Create your first metamodel

In this section, you’ll learn how to create a metamodel and its corresponding model in Jjodel. To this end, we will define a metamodel for Entity-Relationship Diagrams (ERD)

Create a New Metamodel

The first step is to create a metamodel that defines the core building blocks of your language.

1. Open the Main Menu:

• – Navigate to the upper-left corner of the dashboard and click on the ‘Main Menu’ icon.
• – Select ‘New Metamodel’ from the dropdown options.
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2. Name Your Metamodel:

• – In the dialog box that appears, provide a name for your metamodel (e.g., ERD_Notation) and confirm.

  

3. Define Classes, Attributes, and Relationships:

• – Give focus to the Metamodel Editor (right-hand side with respect to the property tab).
• – Use the tools on the left panel to add classes, attributes, and relationships to your metamodel. 

Define Core Classes:

• • – Create classes Entity, Attribute, and Relationship in the Metamodel Editor.
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Add Attributes:

• • • – Add name as an attribute to Entity, Attribute, and Relationship : however, because it is common to the three classes:
      • – create a class namedElement
      • – declare it as Abstract in the Properties Tab
      • – let the three classes extend namedElement by selecting ‘Extend’ in the contextual menu once each class is selected
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    • – For Attribute, add type
    • – For Relationship, add cardinality

Add Enumerators for type and cardinality

• • – Create an enumerator Type with integer, string, and boolean as literals
  • – Create an enumerator Cardinality with one2one, one2many, and many2many as literals
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Change the type for type in Attribute and cardinality in Entity

• • – Select the attribute type in Attribute
  • – Select Type in the corresponding 
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Create a Metamodel for a Simple UML Class Diagram

This video provides a step-by-step guide to creating a simple UML class diagram metamodel. Viewers will learn how to define core elements such as classes, attributes, and relationships, building a foundational structure for UML modeling. With clear explanations and hands-on examples, the tutorial simplifies metamodeling concepts, making it accessible for both beginners and those looking to reinforce their skills

Watch