diff --git a/angularjs/angular.d.ts b/angularjs/angular.d.ts
index 719e84139b..457a1df358 100755
--- a/angularjs/angular.d.ts
+++ b/angularjs/angular.d.ts
@@ -737,17 +737,37 @@ declare module angular {
         eventFn(element: Node, doneFn: () => void): Function;
     }
 
-    ///////////////////////////////////////////////////////////////////////////
-    // FilterService
-    // see http://docs.angularjs.org/api/ng.$filter
-    // see http://docs.angularjs.org/api/ng.$filterProvider
-    ///////////////////////////////////////////////////////////////////////////
+    /**
+     * $filter - $filterProvider - service in module ng
+     * 
+     * Filters are used for formatting data displayed to the user.
+     * 
+     * see https://docs.angularjs.org/api/ng/service/$filter
+     */
     interface IFilterService {
+        /**
+         * Usage:
+         * $filter(name);
+         * 
+         * @param name Name of the filter function to retrieve
+         */
         (name: string): Function;
     }
 
+    /**
+     * $filterProvider - $filter - provider in module ng
+     * 
+     * Filters are just functions which transform input to an output. However filters need to be Dependency Injected. To achieve this a filter definition consists of a factory function which is annotated with dependencies and is responsible for creating a filter function.
+     * 
+     * see https://docs.angularjs.org/api/ng/provider/$filterProvider
+     */
     interface IFilterProvider extends IServiceProvider {
-        register(name: string, filterFactory: Function): IServiceProvider;
+        /**
+         * register(name);
+         * 
+         * @param name Name of the filter function, or an object map of filters where the keys are the filter names and the values are the filter factories. Note: Filter names must be valid angular Expressions identifiers, such as uppercase or orderBy. Names with special characters, such as hyphens and dots, are not allowed. If you wish to namespace your filters, then you can use capitalization (myappSubsectionFilterx) or underscores (myapp_subsection_filterx).
+         */
+        register(name: string | {}): IServiceProvider;
     }
 
     ///////////////////////////////////////////////////////////////////////////