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# Zuora business object model prior to Orders and Invoice Settlement

> If your tenant was provisioned before 2020, the object model on this page is applicable to you.

If your tenant was provisioned before 2020, the object model on this page is applicable to you.

The following diagram is a high-level view of how key business objects are related to one another within Zuora Billing.

Note:

The diagram does not include the Orders feature or the Invoice Settlement feature. For a diagram that includes the latest features of Zuora Billing, see Zuora business object model
.

Click the diagram to open it in a new tab and zoom in.

![Zuora Billing object model - legacy](/_fern-img/bb79b6284782ae3d9da3bf7ff57278b276769c40f62c950406db0036ad6d9a82.webp)

This diagram is intended to provide a conceptual understanding; it does not illustrate a specific way to integrate with Zuora.