diff --git a/src/ng/compile.js b/src/ng/compile.js
index 615e42516fc1..14ad94e02d4d 100644
--- a/src/ng/compile.js
+++ b/src/ng/compile.js
@@ -1387,7 +1387,12 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
    * binding information and a reference to the current scope on to DOM elements.
    * If enabled, the compiler will add the following to DOM elements that have been bound to the scope
    * * `ng-binding` CSS class
+   * * `ng-scope` and `ng-isolated-scope` CSS classes
    * * `$binding` data property containing an array of the binding expressions
+   * * Data properties used by the {@link angular.element#methods `scope()`/`isolateScope()` methods} to return
+   *   the element's scope.
+   * * Placeholder comments will contain information about what directive and binding caused the placeholder.
+   *   E.g. `<!-- ngIf: shouldShow() -->`
    *
    * You may want to disable this in production for a significant performance boost. See
    * {@link guide/production#disabling-debug-data Disabling Debug Data} for more.