Patch API at infra level can be used in two flavours 1. Like a regular API to update Infra object 2. Hierarchical API: To create/update/delete entire or part of intent hierarchy Hierarchical API: Provides users a way to create entire or part of intent in single API invocation. Input is expressed in a tree format. Each node in tree can have multiple children of different types. System will resolve the dependecies of nodes within the intent tree and will create the model. Children for any node can be specified using ChildResourceReference or ChildPolicyConfigResource. If a resource is specified using ChildResourceReference then it will not be updated only its children will be updated. If Object is specified using ChildPolicyConfigResource, object along with its children will be updated. Hierarchical API can also be used to delete any sub-branch of entire tree.