formalize chat tag

docs/1.0.md

@@ -1609,3 +1609,75 @@ from `<podcast:valueTimeSplit>`.
    </channel>
 </rss>
 ```
+
+
+
+<br><br><br><br><!-- Tag block -->
+## Chat
+`<podcast:chat>`<br><br>
+This element allows a podcaster to attach information to either the `channel`, `item` or `<podcast:liveItem>` about 
+where the "official" chat for either the podcast or a specific episode or live event is to be found.  Just like 
+`<podcast:socialInteract>` functions for social media, the `chat` tag will function for ephemeral chat.  There are 
+many protocols in use across the internet for chat based communication.  This tag is meant to be flexible enough to 
+adapt to whichever protocol the podcaster wants to use.
+
+This element's presence at a particular level governs how it should be treated.  If found at the `item` or 
+`<podcast:liveItem>` level, this should be treated as the information for that specific episode, overriding what is 
+at the `channel` level.  If this tag is found at the `channel` level, it would be considered the chat for the entire 
+podcast and is recommended to be an "always on" chat room experience.
+
+If a podcast has an "always on" style chat service it is recommended to link that at the `channel` level and do not
+use the `<podcast:chat>` tag at the `item` or `<podcast:liveItem>` level.
+
+### Parent
+&nbsp; `<channel>` or `<item>` or `<podcast:liveItem>`
+
+### Count
+&nbsp; Single
+
+### Attributes
+- `server` (required) The fqdn of a chat server that serves as the "bootstrap" server to connect to.
+- `protocol` (required) The [protocol](chatprotocols.txt) in use on the server.
+- `accountId` (recommended) The account id of the podcaster on the server or platform being connected to.
+- `space` (optional) Some chat systems have a notion of a chat "space" or "room" or "topic". This attribute will serve
+  that purpose.
+
+### Example (IRC):
+```xml
+<podcast:chat 
+    server="irc.zeronode.net" 
+    protocol="irc" 
+    accountId="@jsmith" 
+    space="#myawesomepodcast" 
+/>
+```
+
+### Example (XMPP):
+```xml
+<podcast:chat 
+    server="jabber.example.com"
+    protocol="xmpp"
+    accountId="jsmith@jabber.example.org" 
+    space="myawesomepodcast@jabber.example.org" 
+/>
+```
+
+### Example (Nostr):
+```xml
+<podcast:chat 
+    server="relay.example.com" 
+    protocol="nostr" 
+    accountId="npub1pvdw7mm7k20t9dn9gful8n5xua5yv8rmgd9wul88qq5dxj80lpxqd39r3u"
+    space="#myawesomepodcast_episode129" 
+/>
+```
+
+### Example (Matrix):
+```xml
+<podcast:chat 
+    server="example.com"
+    protocol="matrix"
+    accountId="@bob:example.com"
+    space="#general:example.com" 
+/>
+```

docs/chatprotocols.txt

@@ -0,0 +1,4 @@
+irc
+xmpp
+nostr
+matrix