[erlang-questions] XML diff

Richard O'Keefe <>
Wed Feb 1 04:27:39 CET 2012

Look at
and follow the "Our Solution" link.
which refers to Stanley Selkow's paper in
Information Processing Letters, Volume 6, number 6, 1977.

There's a paper by Wuu Yang in Software Practice and
Experience,  Volume 21, issue 7, 739-755 (July 1991),
called "Identifying Syntactic Differences Between Two Programs"
which works by finding differences between their parse trees.

There's a Perl module for precisely this task at
The documentation points to Gregory Cobena's PhD thesis
which can be found through at
I haven't read that, but it has a chapter comparing several

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