haskell@gentoo.org Gentoo Haskell A general sequence representation with arbitrary annotations, for use as a base for implementations of various collection types, with examples, as described in section 4 of * Ralf Hinze and Ross Paterson, \"Finger trees: a simple general-purpose data structure\", /Journal of Functional Programming/ 16:2 (2006) pp 197-217. <http://www.soi.city.ac.uk/~ross/papers/FingerTree.html> For a tuned sequence type, see @Data.Sequence@ in the @containers@ package, which is a specialization of this structure.