From fc3c2cb796fec117da5b12ba3737ac0a7d97e59c Mon Sep 17 00:00:00 2001
From: Lorenz Stechauner <lorenz.stechauner@necronda.net>
Date: Fri, 30 Apr 2021 20:11:06 +0200
Subject: [PATCH] [WIP] Added envelopes

---
 spec/usimp.md | 33 +++++++++++++++++++++++++--------
 1 file changed, 25 insertions(+), 8 deletions(-)

diff --git a/spec/usimp.md b/spec/usimp.md
index 5a6f694..8f63318 100644
--- a/spec/usimp.md
+++ b/spec/usimp.md
@@ -173,6 +173,9 @@ An *User* may have multiple *Profiles* which in turn may contain multiple *Accou
 
 #### 2.3.2 Account {#account}
 
+
+
+
 #### 2.3.3 Profile {#profile}
 
 #### 2.3.4 Account Types {#account-types}
@@ -201,17 +204,31 @@ An *User* may have multiple *Profiles* which in turn may contain multiple *Accou
 #### 2.6.2 Bridge {#bridge}
 
 
-## 3 Transport Protocols {#transport-protocols}
+## 3 Transport {#transport}
 
-Following protocols may be used to transport USIMP messages between USIMP participants:
+### 3.1 Transport Protocols {#transport-protocol}
+
+In USIMP the messages used to communicate between participants are calles envelopes.
+For each of the transport protocols the envelope format may look different.
+Following protocols may be used to transport USIMP envelopes between USIMP participants:
 
 * [*Hypertext Transfer Protocol* (HTTP) and HTTPS](transport/http.md)
 * [*WebSocket Protocol* (WS) and WSS](transport/websocket.md)
 * [*User Datagram Protocol* (UDP)](transport/udp.md)
 
-| Protocol | L3 Protocol | Encrypted | Default Port | Required |
-|----------|-------------|-----------|--------------|----------|
-| HTTP     | TCP         | No        | 80           | Yes      |
-| HTTPS    | TCP         | Yes       | 443          | No       |
-| WS       | TCP         | No        | 80           | No       |
-| WSS      | TCP         | Yes       | 443          | No       |
+| Protocol | L3 Protocol | Encrypted | Default Port | Implementation Required |
+|----------|-------------|-----------|--------------|-------------------------|
+| HTTP     | TCP         | No        | 80           | Yes                     |
+| HTTPS    | TCP         | Yes       | 443          | No                      |
+| WS       | TCP         | No        | 80           | No                      |
+| WSS      | TCP         | Yes       | 443          | No                      |
+
+
+### 3.2 Envelopes {#envelopes}
+
+Each USIMP envelope has to contain the following fields in some form:
+
+* Domain-ID
+* Status
+* Method/Resource name
+* Credentials