Based on the information provided in the extracts, here's a guide on how to implement Role-Based Access Control (RBAC) with Ory Keto and configure it in an access rule authorizer in Ory Oathkeeper. 1. Implement RBAC with Ory Keto: RBAC maps subjects to roles and roles to permissions. In Hierarchical Role Based Access Control (HRBAC), roles can inherit permissions from other roles. For example, you could have roles such as

community

,

marketing

,

finance

, and

admin

, where the

admin

role inherits all privileges from the other roles. This is common in web applications where you often encounter roles such as "administrator", "moderator", etc. [source](https://www.ory.sh/docs/keto/guides/rbac) 2. Configure the authorizer in Ory Oathkeeper: The

keto_engine_acp_ory

authorizer uses the Ory Keto API to carry out access control using "Ory-flavored" Access Control Policies. Here's an example of how to configure it:

yaml    # Global configuration file oathkeeper.yml      authorizers:        keto_engine_acp_ory:        # Set enabled to "true" to enable the authenticator, and "false" to disable the authenticator. Defaults to "false".        enabled: true            config:          base_url: <http://my-keto/>          required_action: ...          required_resource: ...          subject: ...          flavor: ...

And here's an example of how to use it in an Access Rule:

yaml    # Some Access Rule: access-rule-1.yaml      id: access-rule-1      # match: ...      # upstream: ...      authorizers:        - handler: keto_engine_acp_ory        config:          base_url: <http://my-keto/>          required_action: ...          required_resource: ...          subject: ...          flavor: ...

[source](https://www.ory.sh/docs/oathkeeper/pipeline/authz#keto_engine_acp_ory-example) Please note that the implementation of RBAC with Ory Keto currently requires some workarounds and native support is still a work in progress. Also, the configuration of the

keto_engine_acp_ory

authorizer requires specific values for

required_action

,

required_resource

,

subject

, and

flavor

, which are not provided in the extracts. As for Attribute-Based Access Control (ABAC), the extracts do not provide enough information on how to implement it with Ory Keto or configure it in Ory Oathkeeper. You may want to refer to the official Ory documentation for more details.