Based on the information provided in the extracts, you can use the Ory Permission Language (OPL) to define permissions for your healthcare application. OPL is a developer-friendly configuration language that is a subset of TypeScript. It allows you to create permission rules that can be tailored to the specific needs of your application. Here is an example of how you might define a permission rule for the patient table in your application:

typescript import { Namespace, Context } from "@ory/keto-namespace-types"    class Patient implements Namespace {     // All relationships for a single patient.     related: {       doctors: User[]       nurses: User[]     }      // The permissions derived from the relationships and context.     permits = {       // A permission is a function that takes the context and returns a boolean. It can reference `this.related` and `this.permits`.       viewSSN: (ctx: Context): boolean => this.related.doctors.includes(ctx.subject),       viewPHI: (ctx: Context): boolean => this.permits.viewSSN(ctx) || this.related.nurses.includes(ctx.subject),     }   }

In this example, the

viewSSN

permission allows doctors to view the SSN of a patient, and the

viewPHI

permission allows doctors and nurses to view the Protected Health Information (PHI) of a patient. You can create these permission rules using the Ory Console. Go to the Ory Console → Namespaces & Rules and use the editor in the Permission Rules tab. Please note that this is a simplified example and you might need to adjust it to fit the specific needs of your application. For more information on how to use OPL, you can refer to the [Ory Permission Language specification](https://www.ory.sh/docs/keto/reference/ory-permission-language) and the [Ory Keto guides](https://www.ory.sh/docs/keto/guides/simple-access-check-guide).

Sure, you can create PHI as a separate object in your Ory Permission Language (OPL) model. Here's an example of how you might define the

Patient

and

PHI

objects:

typescript import { Namespace, Context } from "@ory/keto-namespace-types"    class User implements Namespace {}    class Patient implements Namespace {     related: {       doctors: User[]       nurses: User[]       phi: PHI[]     }   }    class PHI implements Namespace {     related: {       owners: Patient[]     }      permits = {       view: (ctx: Context): boolean => this.related.owners.includes(ctx.subject),     }   }

In this example, the

Patient

object has relationships with

User

objects (doctors and nurses) and

PHI

objects. The

PHI

object has a relationship with the

Patient

object and a

view

permission that allows the owners (patients) to view their own PHI. You can create these permission rules using the Ory Console. Go to the Ory Console → Namespaces & Rules and use the editor in the Permission Rules tab. Please note that this is a simplified example and you might need to adjust it to fit the specific needs of your application. For more information on how to use OPL, you can refer to the [Ory Permission Language specification](https://www.ory.sh/docs/keto/reference/ory-permission-language) and the [Ory Keto guides](https://www.ory.sh/docs/keto/guides/simple-access-check-guide).