ISO 10962

ISO 10962 is the CFI code (Classification of Financial Instruments). It is a alphabetical code with 6 characters. The first character is the category, the second the group. The trailing 4 characters are special attributes of the group. The character'X' always means "Not applicable/undefined". Here's a (incomplete) list of possible codes:

E = Equities

   S = Shares (common/ordinary)
       1: Voting Right
           V = Voting
           N = Non-voting
           R = Restricted voting
           E = Enhanced voting
       2: Ownership/transfer restrictions
           T = Restrictions
           U = Free
       3: Payment status
           O = Nil paid
           P = Partly paid
           F = Fully paid
       4: Form:
           B = Bearer
           R = Registered
           N = Bearer/Registered
           Z = Bearer depository receipt
           A = Registered depository receipt
   P = Preferred Shares
   C = Convertible preferred shares
   U = Units (units trusts/mutual funds)
   M = Others

D = Dept Instruments

   B = Bonds
   C = Convertible Bonds
   M = Others
   T = Medium-term Notes
   W = Bonds With Warrants Attached
   Y = Money Market Instruments

R = Entitlements (Rights)

   A = Allotment Rights
   M = Others (Miscellaneous)
   S = Subscription rights
   W = Warrants

O = Options

   C = Call Options
   P = Put Options

F = Futures

   C = Commodities Futures
   F = Financial Futures

M = Others (Miscellaneous)

   M = Other Assets (Miscellaneous)
   R = Referential Instruments

Example: ESNTPB is Equities/Shares/Non-voting/Restrictions/Partly paid/Bearer