# Updating a resource model

<span class="rvts6">The material tracking layer entity is initialized in the same fashion as other processed entities in the platform. These steps are described in this topic in a general way:</span>

- [Triggering Jobs](https://help.mystart.com/books/developer-manual/page/triggering-jobs "Triggering Jobs")

<span class="rvts6">It is also possible to update an existing material tracking layer with a new version of a resource model. This requires the following additional steps:</span>

1. <span class="rvts6">Set the "state" property of the Material Tracking entity to "PARTIAL"</span>
2. <span class="rvts6">Set the "update\_resource\_models" property to a comma-separated list of IDs. Each ID in this list corresponds to a Block Model entity</span>
3. <span class="rvts6">Set the "update\_resource\_model\_timestamps" property to a comma-separated list of timestamp values. There must be one value for each resource model listed in the "update\_resource\_models" property. The update operations will be logged using the corresponding timestamps.</span>