docs: Update README

Author: joachimvh

README.md

@@ -9,7 +9,7 @@ This repository contains SolidLab research artefacts on use of UMA in the Solid
 
 - [`@solidlab/uma-css`](packages/css): UMA modules for the [Community Solid Server](https://github.com/CommunitySolidServer/CommunitySolidServer/).
 
-- [`@solidlab/ucp`](packages/ucp): Usage Control Policy decision/enforcement component.
+- [`@solidlab/ucp`](packages/ucp): Usage Control Policy utility component.
 
 ## Getting started
 
@@ -28,7 +28,6 @@ You can then execute the following flows:
 - `yarn script:private`: `PUT` some text to the private `/alice/private/resource.txt`, protected by a simple WebID check;
 - `yarn script:uma-ucp`: `PUT` some text to the private `/alice/other/resource.txt`, protected by a UCP enforcer checking WebIDs according to policies in `packages/uma/config/rules/policy/`.
 - `yarn script:registration`: `POST`, `GET` and `DELETE` some text to/from `/alice/public/resource.txt` to test the correct creation and deletion of resource registrations on the UNA server.
-- `yarn script:ucp-enforcement`: Run the UCP enforcer in a script (`scripts/test-ucp-enforcement.ts`). This does not need the servers to be started.
 
 `yarn script:flow` runs all flows in sequence.
 
@@ -46,24 +45,13 @@ which runs with experimental contracts.
 The packages in this project currently only support a fixed UMA AS per CSS RS.
 Authorization can be done with a simple, unverified, WebID embedded in the ticket
 using the [WebIdAuthorizer](packages/uma/src/policies/authorizers/WebIdAuthorizer.ts)
-or the [PolicyBasedAuthorizer](packages/uma/src/policies/authorizers/PolicyBasedAuthorizer.ts)
+or the [OdrlAuthorizer](packages/uma/src/policies/authorizers/OdrlAuthorizer.ts)
 which supports simple ODRL policies.
+A [NamespacedAuthorizer](packages/uma/src/policies/authorizers/NamespacedAuthorizer.ts)
+is used to apply different authorizers to different containers.
 
-### Usage control policy enforcement
+## ODRL
 
-Used for creating a modular engine that calculates which access modes are granted based on:
-
-- Usage Control Rules
-- Interpretation of those rules
-- The request of the Requested Party together with all its claims
-
-For more information, you can check out its [own repository](https://github.com/woutslabbinck/ucp-enforcement) which has three engines that use [ODRL rules](https://www.w3.org/TR/odrl-model/).
-
-A test script is provided for a CRUD ODRL engine: `yarn script:ucp-enforcement`.
-In the [script](./scripts/test-ucp-enforcement.ts) a read Usage Control Rule (in ODRL) is present together with N3 interpretation rules.
-Then a read request is performed using the engine, which results in a list of grants. This list is then printed to the console.
-
-
-## Next steps
-
-More advanced ODRL evaluation can be found in the `feat/ODRL-evaluator` branch.
+A variant of the server that only uses ODRL for authorization can be started with `yarn start:odrl`.
+A corresponding script can then be executed with `yarn script:uma-odrl`.
+The test policies can be found in [packages/uma/config/rules/odrl](packages/uma/config/rules/odrl).