Fri Jul 31 12:23:28 CEST 2009

Trees and paths

I'm looking for a nice abstraction that combines tree structures
(filesystems, XML, quicktime/mpeg4, ...) with zipper-like iteration.

Frankly I'm confused again by slight nuances between different tree
forms.  The operation I want is mostly path access (single item) or
path globbing (list).

[1] http://en.wikipedia.org/wiki/Xpath
[2] http://en.wikipedia.org/wiki/XQuery
[3] http://en.wikipedia.org/wiki/XSLT