diff --git a/73.md b/73.md
index 7fb9a3c3c5..db96c3046e 100644
--- a/73.md
+++ b/73.md
@@ -13,19 +13,20 @@ There are certain established global content identifiers such as [Book ISBNs](ht
 
 ## Supported IDs
 
-| Type                   | `i` tag                                                    | `k` tag                  |
-| ---                    | ---                                                        | ---                      |
-| URLs                   | "`<URL, normalized, no fragment>`"                         | "web"                    |
-| Books                  | "isbn:`<id, without hyphens>`"                             | "isbn"                   |
-| Geohashes              | "geo:`<geohash, lowercase>`"                               | "geo"                    |
-| Movies                 | "isan:`<id, without version part>`"                        | "isan"                   |
-| Papers                 | "doi:`<id, lowercase>`"                                    | "doi"                    |
-| Hashtags               | "#`<topic, lowercase>`"                                    | "#"                      |
-| Podcast Feeds          | "podcast:guid:`<guid>`"                                    | "podcast:guid"           |
-| Podcast Episodes       | "podcast:item:guid:`<guid>`"                               | "podcast:item:guid"      |
-| Podcast Publishers     | "podcast:publisher:guid:`<guid>`"                          | "podcast:publisher:guid" |
-| Blockchain Transaction | "`<blockchain>`:[`<chainId>`:]tx:`<txid, hex, lowercase>`" | "`<blockchain>`:tx"      |
-| Blockchain Address     | "`<blockchain>`:[`<chainId>`:]address:`<address>`"         | "`<blockchain>`:address" |
+| Type                   | `i` tag                                                        | `k` tag                  |
+| ---                    | ---                                                            | ---                      |
+| URLs                   | "`<URL, normalized, no fragment>`"                             | "web"                    |
+| Nostr NIPs             | "`<NIP number>` OR `<NIP kind>`:`<NIP pubkey>`:`<NIP d tag>`"  | "nip"                    |
+| Books                  | "isbn:`<id, without hyphens>`"                                 | "isbn"                   |
+| Geohashes              | "geo:`<geohash, lowercase>`"                                   | "geo"                    |
+| Movies                 | "isan:`<id, without version part>`"                            | "isan"                   |
+| Papers                 | "doi:`<id, lowercase>`"                                        | "doi"                    |
+| Hashtags               | "#`<topic, lowercase>`"                                        | "#"                      |
+| Podcast Feeds          | "podcast:guid:`<guid>`"                                        | "podcast:guid"           |
+| Podcast Episodes       | "podcast:item:guid:`<guid>`"                                   | "podcast:item:guid"      |
+| Podcast Publishers     | "podcast:publisher:guid:`<guid>`"                              | "podcast:publisher:guid" |
+| Blockchain Transaction | "`<blockchain>`:[`<chainId>`:]tx:`<txid, hex, lowercase>`"     | "`<blockchain>`:tx"      |
+| Blockchain Address     | "`<blockchain>`:[`<chainId>`:]address:`<address>`"             | "`<blockchain>`:address" |
 
 ---
 
@@ -43,6 +44,39 @@ For the webpage "https://myblog.example.com/post/2012-03-27/hello-world" the "i"
 ]
 ```
 
+### Nostr NIPS
+
+Allow 'all of nostr' to reference, comment, and react on any published NIP spec in a standardized manner, regardless of which repo or nostr event kind they are posted to. The `i` tag is either a finalized NIP number or a standard format matching `a` tags (`<kind integer>:<32-bytes lowercase hex of a pubkey>:<d tag value>`) if referencing a published Nostr event. Use a URL hint to suggest a web page, without hard linking to a specific repo or nostr client. 
+
+
+A NIP published to GitHub (NIPs repo) looks like this:
+
+```jsonc
+[
+  ["i", "25", "https://github.com/nostr-protocol/nips/blob/master/25.md"],
+  ["k", "nip"]
+]
+```
+
+A NIP published to NostrHub looks like this:
+
+```jsonc
+[
+  ["i", "30817:0461fcbecc4c3374439932d6b8f11269ccdb7cc973ad7a50ae362db135a474dd:nips-on-nostr", "https://nostrhub.io/naddr1qvzqqqrcvypzqprpljlvcnpnw3pejvkkhrc3y6wvmd7vjuad0fg2ud3dky66gaxaqqxku6tswvkk7m3ddehhxarjqk4nmy"],
+  ["k", "nip"]
+]
+```
+
+A NIP published to WikiStr looks like this:
+
+```jsonc
+[
+  ["i", "30818:fd208ee8c8f283780a9552896e4823cc9dc6bfd442063889577106940fd927c1:nkbip-01", "https://wikistr.com/nkbip-01*fd208ee8c8f283780a9552896e4823cc9dc6bfd442063889577106940fd927c1"],
+  ["k", "nip"]
+]
+```
+
+
 ### Books:
 
 - Book ISBN: `["i", "isbn:9780765382030"]` - https://isbnsearch.org/isbn/9780765382030