2 files changed, 13 insertions, 1 deletions
diff --git a/lv2/lv2plug.in/ns/extensions/ui/ui.h b/lv2/lv2plug.in/ns/extensions/ui/ui.h
index 56e9455..6dcb8e4 100644
--- a/lv2/lv2plug.in/ns/extensions/ui/ui.h
+++ b/lv2/lv2plug.in/ns/extensions/ui/ui.h
@@ -44,6 +44,7 @@
 #define LV2_UI__portIndex        LV2_UI_PREFIX "portIndex"
 #define LV2_UI__portMap          LV2_UI_PREFIX "portMap"
 #define LV2_UI__portNotification LV2_UI_PREFIX "portNotification"
+#define LV2_UI__portSubscribe    LV2_UI_PREFIX "portSubscribe"
 #define LV2_UI__resize           LV2_UI_PREFIX "resize"
 #define LV2_UI__touch            LV2_UI_PREFIX "touch"
 
diff --git a/lv2/lv2plug.in/ns/extensions/ui/ui.ttl b/lv2/lv2plug.in/ns/extensions/ui/ui.ttl
index 6a62366..f9a7a64 100644
--- a/lv2/lv2plug.in/ns/extensions/ui/ui.ttl
+++ b/lv2/lv2plug.in/ns/extensions/ui/ui.ttl
@@ -294,6 +294,17 @@ they control.  This feature corresponds to the LV2UI_Port_Index struct, which
 should be passed with the URI LV2_UI__portIndex.</p>
 """ .
 
+ui:portSubscribe
+	a lv2:Feature ;
+	lv2:documentation """
+<p>A feature for dynamically subscribing to updates from a port.  This makes it
+possible for a UI to explicitly request a particular style of update from a
+port at run-time, in a more flexible and powerful way than listing
+subscriptions statically allows.  This feature corresponds to the
+LV2UI_Port_Subscribe struct, which should be passed with the URI
+LV2_UI__portSubscribe.</p>
+""" .
+
 ui:touch
 	a lv2:Feature ;
 	lv2:documentation """
@@ -302,7 +313,7 @@ control.  This is useful for automation, so the host can allow the user to take
 control of a port, even if that port would otherwise be automated (much like
 grabbing a physical morotised fader).  It can also be used for MIDI learn or in
 any other situation where the host needs to do something with a particular
-control and it would be convenient for the user to select it directroy from the
+control and it would be convenient for the user to select it directly from the
 plugin UI.  This feature corresponds to the LV2UI_Touch struct, which
 should be passed with the URI LV2_UI__touch.</p>
 """ .