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+NIP-54
+======
+
+Topical Notes
+-------------
+
+`draft` `optional`
+
+This NIP enables authors to post exclusively into topics, without polluting their main feed. Authors can post to locations, hashtags, labels, and urls in a way that only followers of those topics will receive their posts. 
+
+## Topical Note Kind
+
+Kind `21` defines a `kind:1`-equivalent event that MUST NOT be displayed unless the user follows one of the `g`, `t`, `r` or `l` tags. 
+
+```jsonc
+{
+  "kind": 21,
+  "tags": [
+    ["g", "<geohash>"],
+    ["t", "<hashtag>"],
+    ["r", "<url>"],
+    //.. 
+    ["L", "<label namespace>"],
+    ["l", "<label>", "<label namespace>"],
+  ],
+  "content": "This is a note for followers of the hashtag, location OR url. My followers should not see this.",
+  //...
+}
+```
+
+`.content` MUST be plain text and tags that mention, quote and assemble threading structures MUST follow [NIP-10](10.md).
+
+## Topical Relay Setup
+
+Kind `30021` defines a topic follower. It registers a list of relays to aggregate events for each topic. 
+
+The `d` tag of this kind is equal to `name:value` of the topics used in kind `21`. 
+
+```js
+{
+  "kind": 30021,
+  "tags": [
+    ["d", "g:<my city's geohash>"],
+    ["r", "wss://my-city-owned-relay"],
+    ["r", "wss://independent-but-city-based-relay"],
+    // ... other tags
+    ["title", "Name of this topic"]
+  ],
+  "content": nip44Encrypt([
+    ["r", "wss://my-city-owned-relay2"], // private relay
+    ["title", "Name of this topic"] // private topic title
+    // ... other tags
+  ]),
+  //...other fields
+}
+```
+
+The `.content` contains a list of private tags.
+
+Clients MUST seek and broadcast events from and to the relays defined for each topic. 
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