Re: [docbook-apps] Custom fop header... again

[Gisbert Amm <gia@webde-ag.de>]

Yes, you have to declare the namespace

xmlns:fo="http://www.w3.org/1999/XSL/Format"; in the starting 
"stylesheet"-element of your customization layer as you can see in 
fo/docbook.xsl in the DocBook stylesheet distribution.

If you want to use a namespace, you always have to declare it. You could 
do this within the element that uses it like that

  <fo:external-graphic xmlns:fo="http://www.w3.org/1999/XSL/Format"; 
src="/Users/jacques/Documents/images/logo.png"/>

- but then you had to declare it every time you'd use another FO element.

If you declare it within the root element, it is valid for the whole 
stylesheet like xmlns:xsl="http://www.w3.org/1999/XSL/Transform";, which 
defines all the XSL-Elements (xsl:template, xsl:if and so on).

You could also declare the namespace with another identifier, say "FOO" 
like this xmlns:FOO="http://www.w3.org/1999/XSL/Format"; and you would 
then write <FOO:external-graphic 
src="/Users/jacques/Documents/images/logo.png"/>

You could even mix "fo" and "FOO", but this would be very confusing.

It's more likely you'll want to leave it as "fo" since this looks much 
more familiar and also a bit official :-) I've made the example just to 
give you some idea about this name space concept ;-)

Regards,
Gisbert Amm

christian brugeron wrote:
> I think that you have to use docbook syntax for image inclusion, maybe 
> not fo, or declare the namespace in your xsl
> 
> Bonjour Jacques
> 
> 
> cb
> 
> 
> Le 27 Jul 2004, à 13:07, Jacques a écrit :
> 
>> Hello list,
>>
>> After reading, and reading and reading again the Bob's document about
>> header.content, I made a try.
>>
>> In my custom-layer.xsl file I first put this :
>>
>>     <xsl:template name="header.content">
>>         <xsl:param name="pageclass" select="''"/>
>>         <xsl:param name="sequence" select="''"/>
>>         <xsl:param name="position" select="''"/>
>>         <xsl:param name="gentext-key" select="''"/>
>>         <xsl:choose>
>>             <xsl:when test="$sequence = 'first' and $position = 'left'">
>>                 <xsl:text>FOO</xsl:text>
>>             </xsl:when>
>>         <xsl:choose/>
>>     </xsl:template>
>>
>>     And every fist page of a chapter the word "FOO" appears on the top
>> left. YEAH ! Great victory for me :-)
>>
>> But the target is to put a logo in this place so I have changed :
>>
>> <xsl:text>FOO</xsl:text>
>>
>> by :
>>
>> <fo:external-graphic src="/Users/jacques/Documents/images/logo.png"/>
>>
>> And... it doesn't work.
>>
>> Using xsltproc to generate the fo file I have this error :
>>
>> /Users/jacques/Documents/custom-layer.xsl:11: namespace error :
>> Namespace prefix fo on external-graphic is not defined
>>                                 <fo:external-graphic
>> src="/Users/jacques/Documents/images/logo.png"/>
>>
>> Did I have to use a <xmlns:...> statement somewhere ? And if yes where,
>> and which one ? I must admit that I haven't insterstood this name space
>> concept.
>>
>> Thanks in advance for your help.
>> Jacques
>> -- 
>> Pour qu'il y ait le moins de mécontents possible, il faut toujours 
>> taper sur les mêmes
>>
>>
> Christian Brugeron
> Expert PDF/PostScript - Automatisation de l'édition - XML/XSLT/XSL-F
> O