This Use Case presents the activities involved in the creation of an energy trading transaction. It shows the integration of the deregulated energy market with regulated transmission operations through the Transaction Information System (TIS). TIS produced tags, which link up the commercial transaction (Purchase/Sale) with the operational energy interchange transaction (Received/Delivered), also provide the link to the Billing and Settlement process. This Use Case is focused on the management and tagging of information involved in energy transactions and Billing and Settlement. The supporting functions, such as interface capacity calculation, etc. are not directly addressed.