Add ISO 3166 countries to NIP-73 (#2205)

73.md

@@ -18,6 +18,7 @@ There are certain established global content identifiers such as [Book ISBNs](ht
 | URLs                   | "`<URL, normalized, no fragment>`"                         | "web"                    |
 | Books                  | "isbn:`<id, without hyphens>`"                             | "isbn"                   |
 | Geohashes              | "geo:`<geohash, lowercase>`"                               | "geo"                    |
+| Countries              | "iso3166:`<code, uppercase>`"                              | "iso3166"                |
 | Movies                 | "isan:`<id, without version part>`"                        | "isan"                   |
 | Papers                 | "doi:`<id, lowercase>`"                                    | "doi"                    |
 | Hashtags               | "#`<topic, lowercase>`"                                    | "#"                      |
@@ -43,6 +44,21 @@ For the webpage "https://myblog.example.com/post/2012-03-27/hello-world" the "i"
 ]
 ```
 
+### Geohashes:
+
+- Geohash: `["i", "geo:ezs42e44yx96"]` - https://www.movable-type.co.uk/scripts/geohash.html
+
+Geohashes are a geocoding system that encodes geographic locations into short strings of letters and digits. They MUST be lowercase.
+
+### Countries:
+
+ISO 3166 codes can reference countries (ISO 3166-1 alpha-2) or subdivisions like states/provinces (ISO 3166-2).
+
+- Country (Venezuela): `["i", "iso3166:VE"]`
+- Subdivision (California, USA): `["i", "iso3166:US-CA"]`
+
+ISO 3166 codes MUST be uppercase. More info: https://en.wikipedia.org/wiki/ISO_3166
+
 ### Books:
 
 - Book ISBN: `["i", "isbn:9780765382030"]` - https://isbnsearch.org/isbn/9780765382030

README.md

@@ -92,6 +92,7 @@ They exist to document what may be implemented by [Nostr](https://github.com/nos
 - [NIP-78: Application-specific data](78.md)
 - [NIP-7D: Threads](7D.md)
 - [NIP-84: Highlights](84.md)
+- [NIP-85: Trusted Assertions](85.md)
 - [NIP-86: Relay Management API](86.md)
 - [NIP-87: Ecash Mint Discoverability](87.md)
 - [NIP-88: Polls](88.md)
@@ -260,6 +261,9 @@ They exist to document what may be implemented by [Nostr](https://github.com/nos
 | `30312`       | Interactive Room                | [53](53.md)                            |
 | `30313`       | Conference Event                | [53](53.md)                            |
 | `30315`       | User Statuses                   | [38](38.md)                            |
+| `30382`       | User Trusted Assertion          | [85](85.md)                            |
+| `30383`       | Event Trusted Assertion         | [85](85.md)                            |
+| `30384`       | Addressable Trusted Assertion   | [85](85.md)                            |
 | `30388`       | Slide Set                       | [Corny Chat][cornychat-slideset]       |
 | `30402`       | Classified Listing              | [99](99.md)                            |
 | `30403`       | Draft Classified Listing        | [99](99.md)                            |