The blind, next, previous and rewind allow more direct control over automated indexes from the DIML interface.
The next statement steps forward the exploration of a multidimensionalm array of one unit, modifying is associated automated indexes. If the array is a vector, only the 1st dimansion index variable-name§I is incremented.
If the array has more than 1 dimension, the lowest index is primarily incremented (variable-name§I§I...§I). If the array is "fully specified", any completed "line" will provoque propagation of incrementation to higher indexes.