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From: Jürgen Purtz <[email protected]>
To: [email protected]
Subject: Re: Docbook 5.x
Date: Sat, 2 Jul 2016 12:14:26 +0200
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On 05.05.2016 03:09, Peter Eisentraut wrote:
> I think the process should be something like this:
>
> - Apply your XSLT performance patch.  The patch should be submitted to 
> the next commit fest.
>
> - Wait a while to make sure everyone is happy with the performance. 
> Keep tweaking if necessary.
>
> - Port all DSSSL customizations to XSLT.  Manually evaluate output for 
> quality.
>
> - Switch to XSLT build for official HTML documentation. [milestone 1]
>
> - Convert sources to XML. (There could be substeps here.) [milestone 2]
>
> - Then consider upgrading to DocBook 5. [milestone 3]

During the step from DocBook 4 to DocBook 5 [M3] we will face the 
problem that there are incompatibilities in the DocBook structure. Our 
source is affected by:

 1. It's no longer possible to use <option> and <optional> in a
    recursive fashion.
 2. The content model of <literal>, <function>, <command> and similar
    elements has changed.

In my opinion the first issue is not acceptable and the second one may 
need some DocBook redesign as well as manual changes in our source code. 
The DocBook TC has accepted this concerns and works on a solution. But 
as they are in the last phase of bringing 5.1 to an official OASIS 
standard, we probably have to wait (a long time) until 5.2. You can 
follow the discussion here: 
https://lists.oasis-open.org/archives/docbook/201606/msg00007.html and 
in a direct mail from Bob Stayton:

-----
Hi,
I'm investigating this issue.  I'm trying to track down the history and 
reasoning for this change, but have not yet completed that research.  It 
looks like a mistake to me to limit the content model so much when we 
were consciously trying to maintain backwards compatibility unless there 
were good reasons not to.

Bob Stayton
Sagehill Enterprises
[email protected]
-----


Jürgen Purtz

Btw: Since 16 June 2016 Norman Welsh is no longer chairman of the TC. 
Now Bob holds this position, Norman changed to a 'normal' member of the TC.

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