This part of the 62541 series describes the OPC Unified Architecture Profiles. The Profiles are used to describe the functionality that an OPC UA Server exposes or that an OPC UA Client consumes. The details of the functionality are specified in other parts of IEC 62541. Profiles are used by vendors to advertise the OPC UA capabilities of their products. The Profiles a product supports will typically appear on product data sheets. Buyers will use this Profile information to specify and purchase products that work together and meet specific application requirements. Most OPC UA applications will conform to several, but not all of the Profiles.