[oXygen-user] Subfigure numbering with docbook 5

[Bob Stayton]

Hi Bernhard,

Actually, a figure does not have to be confined to one page. That is a 
stylesheet feature, not a feature of DocBook XML.

In DocBook XSL, a figure element is processed to use the attribute-set 
named 'figure.properties', which by default is defined in fo/param.xsl as:

     <xsl:attribute-set name="figure.properties" 
use-attribute-sets="formal.object.properties"/>

In other words, it inherits the attributes set in 
'formal.object.properties', and one of those attributes is:

    <xsl:attribute name="keep-together.within-column">always</xsl:attribute>

It is this setting that tries to keep a figure to one page, which in 
most cases is what users want.  However, a customization can change that 
behavior.  For example:

<xsl:attribute-set name="figure.properties">
   <xsl:attribute name="keep-together.within-column">
     <xsl:choose>
       <xsl:when test="count(d:mediaobject) > 1">inherit</xsl:when>
       <xsl:otherwise>always</xsl:otherwise>
     </xsl:choose>
   </xsl:attribute>
</xsl:attribute-set>

This is an example of overriding one xsl:attribute in an attribute-set. 
It also shows how the attribute-set is applied separately to each 
instance of figure, so you can count d:mediaobjects and relax the 
keep-together for those instances. These two sections in my book 
illustrate this method of customization:

http://www.sagehill.net/docbookxsl/AttributeSets.html

http://www.sagehill.net/docbookxsl/PrintTableStyles.html#TableTitle

Bob Stayton
Sagehill Enterprises
bobs at sagehill.net

On 10/26/2018 8:32 PM, Bernhard Kleine wrote:
>
> Hi Bob,
>
> unfortunately, your suggestion did not work. Obviously a figure is 
> glued to one page, it cannot be spread on more than one. Therefore, 
> the only thing that comes to my mind would be to reset the figure 
> number by -1. Is this possible?
>
> Regards
>
> Bernhard
>
>
> Am 26.10.2018 um 22:48 schrieb Bob Stayton:
>>
>> Hi Bernhard,
>>
>> This is more of a DocBook issue than an Oxygen XML issue.
>>
>> Currently DocBook 5.1 does not support subfigures, but version 5.2 
>> under development will support a new element named <formalgroup> 
>> which can contain one or more "formal" elements (table, figure, 
>> example, equation).  That would allow for subfigures.  However, there 
>> is currently no release date for DocBook 5.2, nor do the stylesheets 
>> support that element yet.
>>
>> For the current releases, I can only suggest a workaround. Put two 
>> mediaobjects in a figure element (they are allowed), and give each 
>> mediaobject a <caption> element whose para includes  "a." or "b." and 
>> include subtitles there if needed.    Maybe someone else has a better 
>> suggestion.
>>
>> Bob Stayton
>> Sagehill Enterprises
>> bobs at sagehill.net
>> On 10/26/2018 12:09 PM, Bernhard Kleine wrote:
>>> The Docbook definitive Guide does not mention subfigures.
>>>
>>> The Docbook xsl complete Guide does not either.
>>>
>>> I have a figure too large that the text can only be read by magnifying
>>> glass. So I wand two parts of it on two pages. But I cannot see how to
>>> number it correctly Fig. 1a and Fig. 1b. Can please point me in correct
>>> direction?
>>>
>>> Many thanks
>>>
>>> Bernhard
>>>
>>>
>>>
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>>
>>
>>
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