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From Rob Sargent <rsarg...@xmission.com>
Subject Re: Orphan control for headings
Date Thu, 03 Nov 2011 18:34:36 GMT
Your not showing the keep-with-next usage(s)?

On 11/03/2011 12:13 PM, Stefan Hinz wrote:
> Need a kick in the right direction how to debug/address a problem with
> orphans.
>
> Headings (chapter and section titles) that show up as the last line on
> a page are among the most annoying things in the widows and orphans
> space. Text processors will usually implement a rule like "move the
> heading to the next page when it's followed by less than 3 paragraph
> lines". DocBook doesn't seem to have a way to implement a similar
> rule, because "the DocBook DTD does not contain any elements or
> attributes that control page breaking".
>
> However, I found this: "The DocBook XSL stylesheet tries hard to
> prevent bad page breaks in print output. It assigns keep-together
> properties to some output blocks, which prevents insertion of a page
> break within the block. For example, a table with this property will
> be pushed to the next page if the whole table does not fit at the
> bottom of a page. For other blocks the stylesheet adds a
> keep-with-next property to keep the block with the following block.
> This is useful for section titles so they do not appear at the bottom
> of a page with nothing after them. -- Note: The previous version of
> FOP (0.20.5) did not support these keep properties. Be sure to use FOP
> 0.93 or higher."
> (http://www.sagehill.net/docbookxsl/PageBreaking.html#SoftPageBreaks)
>
> However, in a fairly small document (95 pages in PDF/US Letter), I
> found five instances of <section> titles that appeared as the last
> line of a page. The DocBook for all of them looks similar to this:
>
>     <section id="mcm-install-cluster-creating">
>       <title>Creating a MySQL Cluster with &mcm;</title>
>       <indexterm>
>         <primary>clusters</primary>
>         <secondary>creating</secondary>
>       </indexterm>
>       <para>
>         In this section, we discuss the procedure for using &mcm;
>         ...
>
> Could it be that the <indexterm> container is considered a block, and
> the style sheet keeps this (invisible) block together with the title,
> thus finding it in order to put the "next block" (the <para>) on the
> subsequent page?
>
> If so, is there a workaround other than moving the <indexterm> block
> further below (ugly from a maintenance standpoint)?
>
> If not, what's the likely cause of the rendering issue?
>
> Thanks in advance for any pointers!
>

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