diff --git a/51.md b/51.md
index b7229aa8..cbd6be11 100644
--- a/51.md
+++ b/51.md
@@ -4,7 +4,7 @@ NIP-51
 Lists
 -----
 
-`draft` `optional` `author:fiatjaf` `author:arcbtc` `author:monlovesmango` `author:eskema`
+`draft` `optional` `author:fiatjaf` `author:arcbtc` `author:monlovesmango` `author:eskema` `author:gzuuus`
 
 A "list" event is defined as having a list of public and/or private tags. Public tags will be listed in the event `tags`. Private tags will be encrypted in the event `content`. Encryption for private tags will use [NIP-04 - Encrypted Direct Message](04.md) encryption, using the list author's private and public key for the shared secret. A distinct event kind should be used for each list type created.
 
@@ -84,6 +84,43 @@ Then the user would create a 'Categorized People' list event like below:
 }
 ```
 
+Lets say a user wants to create a 'Categorized Bookmarks' list of `bookmarks` and has keys:
+```
+priv: fb505c65d4df950f5d28c9e4d285ee12ffaf315deef1fc24e3c7cd1e7e35f2b1
+pub: b1a5c93edcc8d586566fde53a20bdb50049a97b15483cb763854e57016e0fa3d
+```
+The user wants to publicly include these bookmarks:
+
+```json
+["e", "5c83da77af1dec6d7289834998ad7aafbd9e2191396d75ec3cc27f5a77226f36", "wss://nostr.example.com"],
+["a", "30023:f7234bd4c1394dda46d09f35bd384dd30cc552ad5541990f98844fb06676e9ca:abcd", "wss://nostr.example.com"],
+["r", "https://github.com/nostr-protocol/nostr", "Nostr repository"],
+```
+and privately include these bookmarks (below is the JSON that would be encrypted and placed in the event content):
+
+```json
+[
+    ["r", "https://my-private.bookmark", "My private bookmark"],
+    ["a", "30001:f7234bd4c1394dda46d09f35bd384dd30cc552ad5541990f98844fb06676e9ca:abcd", "wss://nostr.example.com"],
+]
+```
+
+Then the user would create a 'Categorized Bookmarks' list event like below:
+
+```json
+{
+  "kind": 30001,
+  "tags": [
+    ["d", "bookmarks"],
+    ["e", "5c83da77af1dec6d7289834998ad7aafbd9e2191396d75ec3cc27f5a77226f36", "wss://nostr.example.com"],
+    ["a", "30023:f7234bd4c1394dda46d09f35bd384dd30cc552ad5541990f98844fb06676e9ca:abcd", "wss://nostr.example.com"],
+    ["r", "https://github.com/nostr-protocol/nostr", "Nostr repository"],
+  ],
+  "content": "y3AyaLJfnmYr9x9Od9o4aYrmL9+Ynmsim5y2ONrU0urOTq+V81CyAthQ2mUOWE9xwGgrizhY7ILdQwWhy6FK0sA33GHtC0egUJw1zIdknPe7BZjznD570yk/8RXYgGyDKdexME+RMYykrnYFxq1+y/h00kmJg4u+Gpn+ZjmVhNYxl9b+TiBOAXG9UxnK/H0AmUqDpcldn6+j1/AiStwYZhD1UZ3jzDIk2qcCDy7MlGnYhSP+kNmG+2b0T/D1L0Z7?iv=PGJJfPE84gacAh7T0e6duQ==",
+  ...other fields
+}
+```
+
 ## List Event Kinds
 
 | kind   | list type               |
@@ -93,6 +130,7 @@ Then the user would create a 'Categorized People' list event like below:
 | 30000  | Categorized People      |
 | 30001  | Categorized Bookmarks   |
 
+
 ### Mute List
 
 An event with kind `10000` is defined as a replaceable list event for listing content a user wants to mute. Any standardized tag can be included in a Mute List.
@@ -107,4 +145,4 @@ An event with kind `30000` is defined as a parameterized replaceable list event
 
 ### Categorized Bookmarks List
 
-An event with kind `30001` is defined as a parameterized replaceable list event for categorizing bookmarks. The 'd' parameter for this event holds the category name of the list. Any standardized tag can be included in a Categorized Bookmarks List.
+An event of kind `30001` is defined as a parameterized replaceable list event for categorizing bookmarks. The 'd' parameter for this event holds the category name of the list. The bookmark lists may contain metadata tags such as 'title', 'image', 'summary' as defined in [NIP-23 - Long-form Content](23.md). Any standardized tag can be included in a Categorized Bookmark List.
\ No newline at end of file
diff --git a/README.md b/README.md
index 72eb2a4a..f8b77dfb 100644
--- a/README.md
+++ b/README.md
@@ -163,7 +163,7 @@ Please update these lists when proposing NIPs introducing new event kinds.
 | `k`               | kind number (string)                 | --                   | [18](18.md), [72](72.md) |
 | `l`               | label, label namespace               | annotations          | [32](32.md)              |
 | `L`               | label namespace                      | --                   | [32](32.md)              |
-| `r`               | a reference (URL, etc)               | --                   |                          |
+| `r`               | a reference (URL, etc)               | petname              |                          |
 | `r`               | relay url                            | marker               | [65](65.md)              |
 | `t`               | hashtag                              | --                   |                          |
 | `amount`          | millisatoshis, stringified           | --                   | [57](57.md)              |