Re: dbfo-need PI and invalid FO in FOP

> Hi,
>
> after some testing, it seems I found a bug in the FO stylesheets. However,
> I thought, I
> describe the problem so maybe someone can confirm it or correct me.
> I have the following XML:
>
> -----[ list-example.xml ]----
> <chapter lang="en">
>   <title>Test-Chapter</title>
>   <para>This is an example.</para>
>   <procedure>
>     <step>
>       <para>Do this.</para>
>     </step>
>     <?dbfo-need height="5em" ?>
>     <step>
>       <para>Do that.</para>
>     </step>
>   </procedure>
> </chapter>
>
> When I translate the above XML into FO, I get the following error:
>
> SEVERE: Exception
> javax.xml.transform.TransformerException:
> org.apache.fop.fo.ValidationException:
> file:/local/doc/trunk/books/en/tmp/listexample.fo:3:391: Error(3/391):
> fo:list-item-label is missing child elements.
> Required Content Model: marker* (%block;)+
>
> According to the FO specification, a fo:list-item-label[1] must have at
> least on element from
> the %block; parameter entity. So FOP rightly complains. :)
>
> After some search, I found the respective lines in fo/pi.xsl. The attached
> patch file intruduces
> a xsl:if to check for the fop1.extensions and inserts an empty fo:block.
> However, although it
> fixes the validation problem in FOP, it creates a space between the first
> and second step.
> When I move the PI before the </step> tag, the validation error
> disappears.
>
> Any idea how to solve this?
>
>
> Thanks,
> Tom
>
> -------
> [1] http://www.w3.org/TR/xsl/#fo_list-item-body
> $ rpm -q docbook-xsl-stylesheets libxml2 libxslt fop
> docbook-xsl-stylesheets-1.75.1-6.1
> libxml2-2.7.1-9.7.1
> libxslt-1.1.24-19.1
> fop-0.95-27.1
>