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Re: [Gnu-arch-users] Re: arch with 'special files'

From: Cameron Patrick
Subject: Re: [Gnu-arch-users] Re: arch with 'special files'
Date: Wed, 6 Apr 2005 01:46:49 +0800
User-agent: Mutt/1.5.6+20040803i

Andrew Suffield wrote:

> > I believe there is some kind of xml-diff, that compares the trees, not
> > the text ;-). One such is built into openoffice...
> Yes, but there's no corresponding patch tool, nor can there be (any
> more than there can for xdelta), since XML is semantically null and
> syntactically useless.

There is indeed a patch tool.  Take a peek at

and the corresponding research paper

You're kind of right though - the patch tool described in that paper
does not handle inexact patching well.  However, it does describe a
3-way merge algorithm, which it claims to be useful for revision
control and file synchronisation.  It might be feasible to adapt that
algorithm into a more sane patch format which _does_ support inexact

Microsoft also has an XML diff tool, but it's mostly uninteresting as
it doesn't appear to support either inexact patching or 3-way merges.
There also seems to be no description of the algorithm or any
implementation available other than an MS Windows binary.  Bleh.


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