The access method DIV (DATA IN VIRTUAL) is specially suitable for processing the unstructured streams that are frequently encountered in C programs (possibly ported from UNIX).
DIV can be used to process NK-PAM files which are located on public disks and contain no administrative information (BLOCK-CONTROL-INFO=NO).
Repeated access to data that has already been read into a "window" by a preceding access operation can lead to a substantial improvement in performance.
Detailed background information on the DIV access method can be found in the manual "DMS Assembler Interface".
The C runtime library always uses the DIV access method to perform stream-oriented I/O on NK-PAM files without administrative information. The DIV access method cannot be used with NK-PAM files that were opened for record-oriented I/O.