Hello, 1. Currently, you cannot extend FpML Master Schema. You need to pick a specific view (set of schema with specific business process category see which of the messages you need in your work: e.g. reporting, or record-keeping) first and extend that set of schema instead. – If you need just to add annotations in Russian to the existing FpML schema, you could submit your request to FpML to consider. – To properly extend FpML schema, you cannot modify anything in the schema directly. – Extending the FpML schema with additional types and elements is going on in your ABC schema to which you import FpML schema definitions. Your ABC schema will beginning like this: Best regards, Irina Yermakova