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Tableau Semantics
Create a Composed Model Based on a Referenced Model

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Create a Composed Model Based on a Referenced Model

Use an existing semantic model and extend it to create a composed model. When you create a composed model it stays connected to the referenced model, and the referenced model remains the single source of truth. Changes made to the referenced model are automatically added to the composed model, but changes made to the composed model aren’t pushed to the referenced model.

Required Editions

Available in: All editions supported by Data 360. See Data 360 edition availability.
User Permissions Needed
To create a semantic model:

Permission set:

  • Data Cloud Architect

AND

Semantic Models object
  1. In Data Cloud, on the Semantic Layer tab, click New Model.
  2. Select Create from Existing Model and then click Next.

    A list of semantic models that you have access to appears.

    Create from Existing Model in the New Semantic Model screen

  3. Select the semantic model to use as the Referenced Model, and then click Next.

    Selecting the needed Semantic Model in the New Semantic Model screen

  4. Enter the Composed model information.

    The information fields on the New Semantic Model screen

  5. Give the model a descriptive name and an API name, and enter an optional description. You can’t change the API name after the model is created.
  6. Click Create.

    After you create a composed model, you can:

    • Add new definitions to the composed model independent from the referenced model.
    • Override definitions from the referenced model to customize properties.
    • Delete the referenced model to remove all its semantic definitions from the composed model and make it an independent model (a semantic model that's not based on any other model).
  • Override Semantic Definitions in a Composed Semantic Model
    When you create a composed model, the composed model inherits all property definitions from the referenced model. If you change any property definition, the new definition is defined as an override. An overridden property definition is not connected to the referenced model. As such, your overridden property definitions are not changed when the referenced model is updated. Properties without overrides on the other hand, remain connected to the referenced model data source and receive updates from it, keeping it as the source of truth. If you want to return to the original values, you can always revert the override and resume automatic updates.
  • Override a Field, Data Object, or Calculated Field Property
    Learn how to override a definition in a composed model. The process disconnects one or more definitions from a referenced model allowing you to keep the custom definition free from updates to the referenced model.
  • Revert Overrides
    Learn how to reconnect semantic definitions to an associated referenced model. This action reverts the semantic definition back to the current value of the referenced model. It doesn't delete the composed model.
  • Add Fields to a Composed Model
    In a composed model, you can add standard or custom fields that weren’t originally selected in the referenced model. You can edit these fields only in the composed model. They aren’t included in the referenced model.

See Also

 
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