Security master. Securities with their identifiers (ticker, ISIN, CUSIP, SEDOL, FIGI), issuer, classification and trading attributes. The ticker symbol is the key. Key: symbol. One file: the header attributes, then the records. The business date the data is for (YYYY-MM-DD). Your firm code, shown on Data › Feeds (e.g. F00012). Who produced the file (vendor or system name). When the file was produced (UTC). The number of record elements. A file whose count does not match is refused (F004): it was probably cut short. delta: only the records in the file change, and action="delete" removes one. full: the file is complete; records it does not list are inactivated, up to the feed's safety threshold. One security master record. Elements may appear in any order. The security's name. Text, up to 120 characters. The issuer's name. Share classes of one issuer share it, so issuer limits count them together. Text, up to 120 characters. Your code for the issuer (see the issuers data set). A code: letters, digits, "_", "." or "-", up to 20. Sector (GICS-style), used by sector limits. Text, up to 40 characters. Industry within the sector. Text, up to 80 characters. Country of risk (ISO 3166-1 alpha-2), used by country limits. An ISO 3166-1 alpha-2 country code, e.g. US. Asset class, used by asset-class limits. One of: equity, fixed_income, commodity, cash_equivalent, treasury, other. Security type: equity, etf or adr. One of: equity, etf, adr. Market-cap bucket, used by market-cap limits. One of: mega, large, mid, small. Trading currency (ISO 4217). An ISO 4217 currency code, e.g. USD. Primary exchange (MIC or short code). A code: letters, digits, "_", "." or "-", up to 12. Average daily volume in shares, used by the liquidity rule and the slicing advice. A decimal number written as text, e.g. 1234.5 (min 0). false marks the security inactive: it can no longer be ordered. true or false. upsert (insert or update by key) or delete (removes the record; a security or account is inactivated, never deleted). The security's identifiers, each with its scheme. TICKER is required (the key); ISIN, CUSIP, SEDOL and FIGI check digits are verified. The ticker symbol. The key of the record: a file that sends the same symbol again updates it. A ticker symbol: letters, digits, "." or "-", up to 12. Required.International Securities Identification Number. The check digit is verified. An ISIN (12 characters, check digit verified).CUSIP (9 characters). The check digit is verified. A CUSIP (9 characters, check digit verified).SEDOL (7 characters). The check digit is verified. A SEDOL (7 characters, check digit verified).Financial Instrument Global Identifier. The check digit is verified. A FIGI (12 characters, check digit verified).