Symbols with a | in the middle are for conditional claims which result in the value of the symbol before the | if the symbol after the | is true.
Symbols with a ~ in the middle are for conditional claims which result in the value of the symbol before the ~ if the symbol after the ~ is false.
Symbols starting with an @ are templates (used for creating claims with standard wording).
Symbols for recurring claims end with a number indicating the year followed
by a letter indicating the settlement month similar to the way symbols for
commodity futures are created. For example, a symbol for a consumer price
report that is expected to be released in December 2000 might have a symbol
of CPI0z. Note that the settlement month may be different
from the time period which the underlying data describes (e.g. the
CPI0z claim mentioned above would refer to the CPI report about November
prices).
Here are the letters with the months to which they correspond:
Currently only one digit is used to indicate the year, but multiple digits may be used in the future.