Description

This function adds a new metadata name-value-type tuple to a designated name-value record.

The struct tm fields are as defined in the POSIX standard and interpreted by mktime(3C). All fields are ignored except:

     int tm_mday; /* day of the month - [1, 31] */
     int tm_mon; /* months since January - [0, 11] */
     int tm_year; /* years since 1900 */

The name-value record automatically expands as needed. The name and value are copied into the structure.