The ct_capability routine uses these parameters to support CS_BIGDATETIME and CS_BIGTIME:
CS_DATA_BIGDATETIME and CS_DATA_BIGTIME are request capabilities sent to the server to determine whether CS_BIGDATETIME and CS_BIGTIME are supported.
CS_DATA_NOBIGDATETIME and CS_DATA_NOBIGTIME are response capabilities sent from the server indicating that CS_BIGDATETIME and CS_BIGTIME should not be used.
For information about request and response capabilities, see the Open Client Client-Library/C Reference Manual and Open Server Sever-Library/C Reference Manual, respectively.