health_check's target explained

website/source/docs/providers/aws/r/elb.html.markdown

@@ -109,7 +109,10 @@ Health Check (`health_check`) supports the following:
 
 * `healthy_threshold` - (Required) The number of checks before the instance is declared healthy.
 * `unhealthy_threshold` - (Required) The number of checks before the instance is declared unhealthy.
-* `target` - (Required) The target of the check.
+* `target` - (Required) The target of the check. Valid pattern is "${PROTOCOL}:${PORT}${PATH}", where PROTOCOL
+  values are:  
+  * `HTTP`, `HTTPS` - PORT and PATH are required
+  * `TCP`, `SSL` - PORT is required, PATH is not supported
 * `interval` - (Required) The interval between checks.
 * `timeout` - (Required) The length of time before the check times out.