-## Table of contents
-* [Introduction](#introduction)
-* [Release notes](#release-notes)
-* [Prerequisites](#prerequisites)
-* [Project folders structure](#project-folders-structure)
-* [Installation guide](#installation-guide)
- * [Compiling code](#compiling-code)
- * [Building docker container](#building-docker-container)
- * [Installing Routing Manager](#installing-routing-manager)
- * [Testing and Troubleshoting](#testing-and-troubleshoting)
-* [Upcoming changes](#upcoming-changes)
-* [License](#license)
-
-## Introduction
-__Subscription Manager__ is a basic platform service of RIC. It is responsible to serve, coordinate and manage xApps' subscriptions.
-
-Submgr acts as an anchor point for subscription related internal messaging, i.e. every xApp sends its subscription related messages to Submgr. Submgr invokes Routing Manager (Rtmgr) to create or tear down the subscription related routes, and the appropriate E2 Termination to signal the subscription related event also towards the RAN.
-
-The solution base on the [xapp-frame](https://gerrit.o-ran-sc.org/r/admin/repos/ric-plt/xapp-frame) project which provides common HttpREST, RMR and SDL interfaces.
-
-Current implementation provides the following functionalities:
-* Handling RIC_SUB_REQ and RIC_SUB_RESP type RMR messages
-* Generating New subscription ID and forwarding subscription request to E2 termination
-* Receiving Subscription response and sendig it back to the subscriber
-
-## Release notes
-Check the separated `RELNOTES` file.
+## Subscription Manager User guide
+
+ Subscription manager User guide is available here: https://docs.o-ran-sc.org/projects/o-ran-sc-ric-plt-submgr/en/latest/user-guide.html
+ The document source is under the submgr/doc directory. Web document is generated automatically from that after the change has been merged
+ in the ORAN Gerrit repo.
+
+## ORAN E2 interface specifications
+
+ WG3: The Near-Real-Time RIC and E2 Interface Workgroup
+ https://www.o-ran.org/specifications
+
+## Compiling Subscription Manager code
+
+### Just to compile Docker image give this command