Services are features exported by your application for the
benefit of other applications. Services let you share the
resources and capabilities of your application with other
applications in the system. Users access services through the
Services menu that’s found in every application’s application
menu. An application does not need to know in advance what
operations are available; the application merely needs to
indicate the types of data it uses. The Services menu will make
available the operations that apply to those types when they
apply. This document describes how OS X services work, shows
some typical Services menus, and provides instructions on how
you can use services in your application. Who Should Read This
Document? You should read this document if you are a Cocoa
application developer and want to provide your application’s
services to other applications or make services from other
applications available to your application. Before you read this
document, you should be familiar with information pro