You can write data to a data entry, write data to the adjunct area when the structure is defined with adjunct areas, or write data to both a data entry and adjunct area for a data item. You pass data to be written to the data entry in a buffer specified on the BUFFER and BUFSIZE keywords, or multiple buffers specified on the BUFLIST, BUFNUM, BUFALET, and BUFINCRNUM keywords. (BUFALET allows you to specify an access list entry token or ALET for use in referencing BUFLIST buffers.) Both methods enable you to pass up to 65536 (64K) bytes of data. You pass data to be written to the adjunct area in a single 64-byte storage area (the ADJAREA keyword).

For information about whether to use a single buffer or multiple buffers and for information on selecting buffer attributes, see Selecting a Data Buffer For a Request.