diff --git a/index.bs b/index.bs
index 5c270c4..d85a2d5 100644
--- a/index.bs
+++ b/index.bs
@@ -1702,8 +1702,6 @@ following additional fields:
     display could return this value as 1.6 to indicate its preferred content
     scaling. Default is none.
 
-Issue(194): Expose capabilities for decoding HDR transfer functions and metadata formats.
-
 : color-gamuts (optional)
 :: An optional field indicating what color spaces can be decoded and rendered by
     the media receiver.  The media sender may use these values to determine how
@@ -1711,6 +1709,27 @@ Issue(194): Expose capabilities for decoding HDR transfer functions and metadata
     in the [[!MEDIA-CAPABILITIES|Media Capabilities]] API.  The default value is
     a list with the single entry "srgb".
 
+: hdr-formats (optional)
+:: An optional field indicating what HDR transfer functions and metadata formats
+    can be decoded and rendered by the media receiver.  Each `video-hdr-format`
+    consists of two fields, `transfer-function` and `hdr-metadata`.
+
+    The `transfer-function` field must be a valid
+    [[MEDIA-CAPABILITIES#transferfunction|TransferFunction]]
+    and the `hdr-metadata` field must be a valid
+    [[MEDIA-CAPABILITIES#hdrmetadatatype|HdrMetadataType]], both defined in the
+    [[!MEDIA-CAPABILITIES|Media Capabilities]] API.
+
+    If a `video-hdr-format` is provided with a `transfer-function` but no
+    `hdr-metadata`, then the media receiver can render the `transfer-function`
+    without any associated metadata.  (This is the case, for example, with the
+    "hlg" `transfer-function`.)
+
+    The media receiver should ignore duplicate entries in `hdr-formats.`
+    If no `hdr-formats` are listed, then the media reciever cannot decode any
+    HDR formats.
+
+
 : native-resolutions (optional)
 :: An optional field indicating what video-resolutions the media receiver supports and
     considers to be "native," meaning that scaling is not required.
diff --git a/messages_appendix.cddl b/messages_appendix.cddl
index 08c5534..6a10aca 100644
--- a/messages_appendix.cddl
+++ b/messages_appendix.cddl
@@ -553,6 +553,11 @@ video-resolution = {
   1: uint ; width
 }
 
+video-hdr-format = {
+  0: transfer-function ; string
+  1: ? hdr-metadata ; string
+}
+
 receive-video-capability = {
   0: format ; codec
   ? 1: video-resolution ; max-resolution
@@ -564,6 +569,7 @@ receive-video-capability = {
   ? 7: [* video-resolution] ; native-resolutions
   ? 8: bool ; supports-scaling
   ? 9: bool ; supports-rotation
+  ? 10: [* video-hdr-format] ; hdr-formats
 }
 
 receive-data-capability = {