Abstract: Described is a mechanism for providing scoped modular services (SMS) through an API. A common set of services is provided by the API that may be enabled or disabled by each component. The services are managed using a property system in the same manner as element properties are used, such as properties relating to text formatting. This helps to ensure fine control and a high degree of customization for a user interface. The use of the services is not limited to editing in the common sense of the word. The SMS is a mechanism for controlling access to implementation of services contained within a tree of components. Services may also be created by developers that are managed by a service manager along with the common services.