The International Capital Market Association (ICMA) and the International Swaps and Derivatives Association (ISDA) have submitted responses to the Eurosystem's consultation on the Appia roadmap, a strategic initiative to develop a European tokenised financial ecosystem. ICMA's response, submitted on 21 April 2026, supports the proposed high-level principles while recommending additional principles including interoperability, standardisation and proportionality. ICMA emphasises that international interoperability is critical given the global nature of financial markets and advocates for multiple interoperable networks operating under harmonised standards rather than a single Eurosystem-operated network. ISDA's response, submitted on 22 April 2026, broadly supports the roadmap but recommends expanding the market access and integration principle to explicitly address interoperability with tokenised ecosystems in other jurisdictions. Both organisations stress the importance of adopting common standards, particularly the open-source Common Domain Model, to facilitate interoperability and prevent market fragmentation. The responses reflect views from across the international debt capital markets value chain including issuers, banks, investors and market infrastructures.