Once you create a number of models, you can start creating relationships between models. For example, if you have models for Patient  and Visit , you can link these models together by clicking on the Relationship Type pane and adding a relationship type (i.e. Patient --attends--> Visit):

Once you create this relationship, you will see it in the Relationship Type pane:

Once you have models and relationships created, you can create records (i.e. individual instances) of these models.

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