diff --git a/17.md b/17.md
index 73e61f72..276e1ee3 100644
--- a/17.md
+++ b/17.md
@@ -154,11 +154,11 @@ class BloomFilter(size: Int, rounds: Int, buffer: ByteArray, salt: ByteArray) {
 }
 ```
 
-Example event:
+Example event for direct chats:
 
-```json
+```js
 {
-    "pubkey" : "badbdda507572b397852048ea74f2ef3ad92b1aac07c3d4e1dec174e8cdc962a",
+    "pubkey" : sha256(hkdf(private_key, salt: 'nip17') || "<badbdda507572b397852048ea74f2ef3ad92b1aac07c3d4e1dec174e8cdc962a>"),
     "kind": 30010,
     "created_at": 1738964056,
     "tags": [
@@ -173,6 +173,25 @@ Example event:
 
 In this example the pubkey `badbdda507572b397852048ea74f2ef3ad92b1aac07c3d4e1dec174e8cdc962a`, has confirmed that they saw the messages with ids of `ca29c211f1c72d5b6622268ff43d2288ea2b2cb5b9aa196ff9f1704fc914b71b` and `460c25e682fda7832b52d1f22d3d22b3176d972f60dcdc3212ed8c92ef85065c` from pubkey `bd4ae3e67e29964d494172261dc45395c89f6bd2e774642e366127171dfb81f5`.
 
+> d tag uses the hkdf defined in [NIP-44](44.md).
+
+Example event for group messages:
+
+```js
+{
+    "pubkey" : sha256(hkdf(private_key, salt: 'nip17') || "<badbdda507572b397852048ea74f2ef3ad92b1aac07c3d4e1dec174e8cdc962a>"),
+    "kind": 30010,
+    "created_at": 1738964056,
+    "tags": [
+        [
+            "d",
+            "bd4ae3e67e29964d494172261dc45395c89f6bd2e774642e366127171dfb81f5"
+        ]
+    ],
+    "content": "100:10:AAAkAQANcYQFCQoB:hZkZYqqdxcE",
+}
+```
+
 A client MAY encrypt the `.content` based on [NIP-44](44.md) for more privacy.
 
 ## Relays