Proxy types that carry dictionary metadata and have XML data type simple contents. true A data type for Base64-encoded binary data. A data type for binary-valued logic (true/false). A data type for a calendar date with the format CCYY-MM-DD. A data type for arbitrary precision decimal numbers. A data type for a duration of time with the format PnYnMnDTnHnMnS, where nY is the number of years, nM is the number of months, nD is the number of days, nH is the number of hours, nM is the number of minutes, and nS is the number of seconds. A data type for a Gregorian calendar year with the format CCYY. A data type for character strings in XML. A data type for an instant of time with the format hh:mm:ss.sss.