This document discusses web services and how to consume web services in Microsoft Dynamics AX 2012. It defines web services as application components that communicate using open protocols and XML. The benefits of web services include exchanging data between different applications and platforms, solving interoperability issues, and reusing application components. It provides steps to consume an external web service in AX 2012, which includes creating a reference to the web service, calling the web service from the X++ proxy library, and writing a job to access the web service.