update readme with new URI scopes

1 files changed, 4 insertions, 2 deletions

diff --git a/Readme.md b/Readme.md
index d76c70f..837af7f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -76,8 +76,10 @@ For now there are three types of such rules:
 In case an URI is encountered and there is no applicable rule, it will be rejected
 (note that this means you'll have to explicitly allow `https://` for links!)
 
-For now there are two (useful) scopes: `map` applies to tiled map links 
-(i.e. `exitUrl`), and `website` applies to weblinks (i.e. `openWebsite`).
+There are currently four possible scopes: `map` applies to tiled map links 
+(i.e. `exitUrl`), `website` to `openWebsite`, `audio` to `playAudio`, and
+`bbb` to Big Blue Button rooms (though that last one may be changed again,
+depending on the bbb deployment in use).
 
 
 ## Output