cycles

While much has been written about hypertext's most superficial and incidental properties -- the resolution of the screen, the use of illustration - we can expect to learn only by reading and studying hypertexts.
For example, few have noted the centrality of circles -- of cyclical link structures -- to contemporary hypertext writing. Cycles in hypertext create and explain structure. Through measured repetition, we bring order to what might otherwise become an endlessly varied (and thus endlessly monotonous) line of argument.

Just as phrase and cadence clarify the structure of music, cycles clarify the structure of hypermedia.