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Re: [xsl] Highlighting changes in a diff report

Subject: Re: [xsl] Highlighting changes in a diff report
From: "Trevor Nicholls trevor@xxxxxxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 13 Jun 2014 08:44:19 -0000

There may be better tools than this, but I have used DaisyDiff
(https://code.google.com/p/daisydiff/ ), which compares HTML not XML. In our
application most of the XML files are documentation files which are going to
be viewed in a browser by users anyway, so we just use a variation on the
standard stylesheet to produce HTML for the diff tool. We also had a
stylesheet which effectively produced an HTML source listing of the XML for
comparison purposes b that would pick up attribute and element changes that
werenbt necessarily reflected in the standard HTML.



From: Manuel Souto Pico terminolator@xxxxxxxxx
Sent: Friday, 13 June 2014 11:13 a.m.
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: [xsl] Highlighting changes in a diff report

Hi there,

I am looking for ways to create a HTML report of a comparison between two
versions of a XML file, so basically I would need to create a function that
compares the original file with the edited version. I would like to display
the differences with some formatting as in a word processor's track changing

For example (simplified case), given the two XML files, i.e. Orig.xml:


<string>This is a string</string>


and Edited.xml:

<doc ver="new">

<string>This is a text</string>


I would like the output report to show something like this:


<td>This is a <span style="color: red;"><del>string</del></span><span
style="color: blue;"><ins>text</ins></span></td>


Before I start getting my head around this, I wanted to have an expert's
opinion: Can this be done easily with XSLT? (for a basic-level programmer like
me, that is)

I know formatting the output in HTML is not a problem, but finding the exact
differences between the two files might be. Only text content of some elements
(and always the same kind of element) should vary, not the structure of the

My first preference would be to create a stylesheet because I can integrate it
in my workflows, but if this is difficult a ready-made tool would be good as
well as long as it's not too expensive (DeltaXML is too expensive).

I hope someone can advise and even point me in the right direction. Thank you
very much in advance.



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