diff --git a/src/message.rs b/src/message.rs
index 0ed9ad5..c490337 100644
--- a/src/message.rs
+++ b/src/message.rs
@@ -80,9 +80,95 @@ impl From<&NameID> for NameID {
 #[derive(Clone, Debug)]
 enum MsgAction {
     Create(DocDef),
+    // Alter
+    // Remove
     Error(MTTError),
     Query(Access),
     Reply(Response),
+    // Add
+    // Delete
+}
+
+impl From<DocDef> for MsgAction {
+    fn from(value: DocDef) -> Self {
+        MsgAction::Create(value)
+    }
+}
+
+impl From<MTTError> for MsgAction {
+    fn from(value: MTTError) -> Self {
+        MsgAction::Error(value)
+    }
+}
+
+impl From<Access> for MsgAction {
+    fn from(value: Access) -> Self {
+        MsgAction::Query(value)
+    }
+}
+
+impl From<Response> for MsgAction {
+    fn from(value: Response) -> Self {
+        MsgAction::Reply(value)
+    }
+}
+
+#[cfg(test)]
+mod msgactions {
+    use super::*;
+
+    #[test]
+    fn turn_document_definition_into_action() {
+        let value = DocDef::new();
+        let result: MsgAction = value.into();
+        match result {
+            MsgAction::Create(_) => {},
+            _ => unreachable!("Got {:?}: dhould have been create", result),
+        }
+    }
+
+    #[test]
+    fn turn_error_into_action() {
+        let data = "data".to_string();
+        let value = MTTError::DocumentAlreadyExists(data.clone());
+        let result: MsgAction = value.into();
+        match result {
+            MsgAction::Error(result) => match result {
+                MTTError::DocumentAlreadyExists(output) => assert_eq!(output, data),
+                _ => unreachable!("Got {:?}: dhould have been create", result),
+            },
+            _ => unreachable!("Got {:?}: dhould have been create", result),
+        }
+        let value = MTTError::DocumentNotFound(data.clone());
+        let result: MsgAction = value.into();
+        match result {
+            MsgAction::Error(result) => match result {
+                MTTError::DocumentNotFound(output) => assert_eq!(output, data),
+                _ => unreachable!("Got {:?}: dhould have been create", result),
+            },
+            _ => unreachable!("Got {:?}: dhould have been create", result),
+        }
+    }
+
+    #[test]
+    fn turn_query_into_action() {
+        let value = Access::new();
+        let result: MsgAction = value.into();
+        match result {
+            MsgAction::Query(_) => {},
+            _ => unreachable!("Got {:?}: dhould have been query", result),
+        }
+    }
+
+    #[test]
+    fn turn_reply_into_action() {
+        let value = Response::new();
+        let result: MsgAction = value.into();
+        match result {
+            MsgAction::Reply(_) => {},
+            _ => unreachable!("Got {:?}: dhould have been reply", result),
+        }
+    }
 }
 
 #[derive(Clone)]
@@ -93,14 +179,15 @@ struct Message {
 }
 
 impl Message {
-    fn new<D>(doc_id: D, action: MsgAction) -> Self
+    fn new<D, A>(doc_id: D, action: A) -> Self
     where
         D: Into<NameID>,
+        A: Into<MsgAction>,
     {
         Self {
             msg_id: Uuid::new_v4(),
             document_id: doc_id.into(),
-            action: action,
+            action: action.into(),
         }
     }
 
@@ -892,6 +979,16 @@ impl Document {
     }
 }
 
+#[cfg(test)]
+mod documents {
+    use super::support_test::TIMEOUT;
+    use super::*;
+
+    #[test]
+    fn has_data_fields() {
+    }
+}
+
 #[cfg(test)]
 mod createdocs {
     use super::support_test::TIMEOUT;