The item-list Buffer
From InterBase
Go Up to Requesting Information About an Open Blob
The item-list buffer is a char array that holds a sequence of byte values, one per requested item of information. Each byte is an item type, specifying the kind of information desired. Compile-time constants for all item types are defined in ibase.h:
#define isc_info_blob_num_segments 4
#define isc_info_blob_max_segment 5
#define isc_info_blob_total_length 6
#define isc_info_blob_type 7