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5.9.1.6 Collection Progress Flags

X1f4_PROGRESS_BACKWARD

indicates that the traversal mode is a backwards one, with the initial (if) statement picking up the last element in the collection, and the progressing (do-while) statement moving towards the first element

X1f4_PROGRESS_EQCLAUSE

indicates that an alternative entry clause, from a matching position, is present

X1f4_PROGRESS_GECLAUSE

indicates that an alternative entry clause, from a first greater or matching position, is present

X1f4_PROGRESS_GTCLAUSE

indicates that an alternative entry clause, from a first greater position, is present

X1f4_PROGRESS_LECLAUSE

indicates that an alternative entry clause, from a last less or matching position, is present

X1f4_PROGRESS_LTCLAUSE

indicates that an alternative entry clause, from a last less position, is present