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The Derivatives Service Bureau (DSB), founded by the Association of National Numbering Agencies (ANNA) to facilitate the allocation and maintenance of International Securities Identification Numbers (ISINs), Classification of Financial Instrument codes (CFIs) and Financial Instrument Short Names (FISNs) for OTC derivatives, has today opened a Request for Information (RFI) process to identify a reference data provider for provision of underlier identifiers for the Unique Product Identifier (UPI).