diff --git a/51.md b/51.md
index 1b2928e..9051376 100644
--- a/51.md
+++ b/51.md
@@ -20,22 +20,23 @@ Standard lists use normal replaceable events, meaning users may only have a sing
 
 For example, _mute list_ can contain the public keys of spammers and bad actors users don't want to see in their feeds or receive annoying notifications from.
 
-| name              | kind  | description                                                           | expected tag items                                                                |
-| ---               | ---   | ---                                                                   | ---                                                                               |
-| Mute list         | 10000 | things the user doesn't want to see in their feeds                    | `"p"` (pubkeys), `"t"` (hashtags), `"word"` (lowercase string), `"e"` (threads)   |
-| Pinned notes      | 10001 | events the user intends to showcase in their profile page             | `"e"` (kind:1 notes)                                                              |
-| Bookmarks         | 10003 | uncategorized, "global" list of things a user wants to save           | `"e"` (kind:1 notes), `"a"` (kind:30023 articles), `"t"` (hashtags), `"r"` (URLs) |
-| Communities       | 10004 | [NIP-72](72.md) communities the user belongs to                       | `"a"` (kind:34550 community definitions)                                          |
-| Public chats      | 10005 | [NIP-28](28.md) chat channels the user is in                          | `"e"` (kind:40 channel definitions)                                               |
-| Blocked relays    | 10006 | relays clients should never connect to                                | `"relay"` (relay URLs)                                                            |
-| Search relays     | 10007 | relays clients should use when performing search queries              | `"relay"` (relay URLs)                                                            |
-| Simple groups     | 10009 | [NIP-29](29.md) groups the user is in                                 | `"group"` ([NIP-29](29.md) group ids + mandatory relay URL)                       |
-| Interests         | 10015 | topics a user may be interested in and pointers                       | `"t"` (hashtags) and `"a"` (kind:30015 interest set)                              |
-| Emojis            | 10030 | user preferred emojis and pointers to emoji sets                      | `"emoji"` (see [NIP-30](30.md)) and `"a"` (kind:30030 emoji set)                  |
-| DM relays         | 10050 | Where to receive [NIP-17](17.md) direct messages                      | `"relay"` (see [NIP-17](17.md))                                                   |
-| Good wiki authors | 10101 | [NIP-54](54.md) user recommended wiki authors                         | `"p"` (pubkeys)                                                                   |
-| Good wiki relays  | 10102 | [NIP-54](54.md) relays deemed to only host useful articles            | `"relay"` (relay URLs)                                                            |
-| Cart/wishlist     | 10402 | [NIP-99](99.md) listings the user wants to purchase or have purchased | `"listing"` ([NIP-99](99.md) listing event IDs)                                                   |
+| name                | kind  | description                                                                               | expected tag items                                                                |
+| ---                 | ---   | ---                                                                                       | ---                                                                               |
+| Mute list           | 10000 | things the user doesn't want to see in their feeds                                        | `"p"` (pubkeys), `"t"` (hashtags), `"word"` (lowercase string), `"e"` (threads)   |
+| Pinned notes        | 10001 | events the user intends to showcase in their profile page                                 | `"e"` (kind:1 notes)                                                              |
+| Bookmarks           | 10003 | uncategorized, "global" list of things a user wants to save                               | `"e"` (kind:1 notes), `"a"` (kind:30023 articles), `"t"` (hashtags), `"r"` (URLs) |
+| Communities         | 10004 | [NIP-72](72.md) communities the user belongs to                                           | `"a"` (kind:34550 community definitions)                                          |
+| Public chats        | 10005 | [NIP-28](28.md) chat channels the user is in                                              | `"e"` (kind:40 channel definitions)                                               |
+| Blocked relays      | 10006 | relays clients should never connect to                                                    | `"relay"` (relay URLs)                                                            |
+| Search relays       | 10007 | relays clients should use when performing search queries                                  | `"relay"` (relay URLs)                                                            |
+| Simple groups       | 10009 | [NIP-29](29.md) groups the user is in                                                     | `"group"` ([NIP-29](29.md) group ids + mandatory relay URL)                       |
+| Interests           | 10015 | topics a user may be interested in and pointers                                           | `"t"` (hashtags) and `"a"` (kind:30015 interest set)                              |
+| Emojis              | 10030 | user preferred emojis and pointers to emoji sets                                          | `"emoji"` (see [NIP-30](30.md)) and `"a"` (kind:30030 emoji set)                  |
+| DM relays           | 10050 | Where to receive [NIP-17](17.md) direct messages                                          | `"relay"` (see [NIP-17](17.md))                                                   |
+| Good wiki authors   | 10101 | [NIP-54](54.md) user recommended wiki authors                                             | `"p"` (pubkeys)                                                                   |
+| Good wiki relays    | 10102 | [NIP-54](54.md) relays deemed to only host useful articles                                | `"relay"` (relay URLs)                                                            |
+| E-commerce cart     | 10402 | [NIP-15](15.md) and [NIP-99](99.md) listings the user wants to purchase                   | `"a"` (kind:30018 and/or kind:30402 listing set)                                  |
+| E-commerce wishlist | 10420 | [NIP-15](15.md) and [NIP-99](99.md) listings the user wants to later purchase             | `"a"` (kind:30018 and/or kind:30402 listing set)                                  |
 
 ## Sets