diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9b8bc5..0738548 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## Last Changes
 
+- [#12](https://github.com/LaxarJS/ax-media-widget/issues/12): Expanded the widget definition
 - [#11](https://github.com/LaxarJS/ax-media-widget/issues/11): Fixed AMD import of template in spec
 
 
diff --git a/widget.json b/widget.json
index cdce777..ca5d5b5 100644
--- a/widget.json
+++ b/widget.json
@@ -26,6 +26,8 @@
             "properties": {
                "resource": {
                   "type": "string",
+                  "format": "topic",
+                  "axRole": "inlet",
                   "description": "A resource topic under which a document resource can be obtained."
                },
                "showTitle": {
@@ -46,6 +48,8 @@
                   "description": "List of actions, any of which triggers loading media content. If omitted, content is loaded immediately. Using a string is DEPRECATED. An array should be used.",
                   "items": {
                      "type": "string",
+                     "format": "topic",
+                     "axRole": "inlet",
                      "description": "An action that triggers loading media content."
                   }
                }
@@ -103,6 +107,8 @@
             "properties": {
                "locale": {
                   "type": "string",
+                  "format": "topic",
+                  "axRole": "inlet",
                   "description": "The topic under which to expect the locale for this widget.",
                   "default": "default"
                }