This emphasis on the smooth flow of links into nodes describes a highly linear reading experience. Interestingly, in Bernstein's examples most of the patterns that would probably relate to 'usability' are represented by highly linear images, the sieve for instance. However, the emphasis in the syntagmatically oriented hypertext is not, as might be thought, on simple patterns (any variety of pattern could be formed by the reader) but on linear continuity.
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See that post with different algorithms in metabole
See the journal French Metablog with today different posts