Paul, I had the same reaction, so I downloaded the files and looked at the readme and commentary.
What I think this is – and Gershon, please correct me if I am wrong – is exploratory work in preparation of formal DITA 1.3 proposals to the TC regarding enhancements to the technical content piece regarding troubleshooting.
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From: firstname.lastname@example.org [mailto:email@example.com] On Behalf Of Grosso, Paul
Sent: Monday, January 02, 2012 10:41 AM
Subject: RE: [dita-techcomm] Groups - DITA 1.2 updated for troubleshooting uploaded
I'm not clear on just what we're talking about here.
Is this just a private experiment, or are you suggesting official changes to the DITA 1.2 DTDs?
From: firstname.lastname@example.org [mailto:email@example.com] On Behalf Of Gershon Joseph
Sent: Sunday, 2012 January 01 10:51
Subject: [dita-techcomm] Groups - DITA 1.2 updated for troubleshooting uploaded
I have updated the DITA 1.2 DTDs to add the troubleshooting functionality to address Cisco use cases 1, 2, and 5 and Avaya's use case 2. I was unable to create a specialization for this without creating an all-new task topic type -- I wanted to make the needed functionality available integrated with the existing kit, so hacking the existing DTDs was the approach I chose in the end (after trying various things via specialization for a full day...).
Please read the README.txt file in the root folder of the zip. I have also included a sample task I used to develop with, and a reference of the changes I made.
At this time I have not provided rendering stylesheets. To be honest, how these new elements are rendered are out of our scope anyway (though we certainly can make non-normative recommendations if the SC feels the need to do so).
Please report any bugs or issues to me.
Best wishes for the new year!
-- Mr. Gershon Joseph