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Subject: Re: [docbook-apps] Using imageobject twice on title page fails (FO)
Hi,If you take a peek inside the generated titlepage.templates.xsl, you'll see that each of the title pages uses different modes to process their elements:
recto page: <xsl:template match="mediaobject" mode="book.titlepage.recto.auto.mode"> <fo:block xmlns:fo="http://www.w3.org/1999/XSL/Format" xsl:use-attribute-sets="book.titlepage.recto.style"> <xsl:apply-templates select="." mode="book.titlepage.recto.mode"/> </fo:block> </xsl:template> verso page: <xsl:template match="mediaobject" mode="book.titlepage.verso.auto.mode"> <fo:block xmlns:fo="http://www.w3.org/1999/XSL/Format" xsl:use-attribute-sets="book.titlepage.verso.style" space-before="1.5in"> <xsl:apply-templates select="." mode="book.titlepage.verso.mode"/> </fo:block> </xsl:template>For many elements (including mediaobject), these modes eventually apply templates in the normal mode. That's why you get duplicate ids.
You'll need to add a template to your customization layer something like this:
<xsl:template match="mediaobject" mode="book.titlepage.verso.mode"><!-- copy the contents of the normal template that matches on mediaobject (from fo/graphics.xsl) here, and remove the part that generates the id attribute. -->
</xsl:template>(Add the namespace prefix d:mediaobject if you are using the namespaced stylesheets with DocBook 5).
Bob Stayton Sagehill Enterprises bobs@sagehill.net On 4/10/2015 5:52 AM, Kallauch, Benjamin (EEIN) wrote:
Hi group. I want to display an image (mediaobject) twice on my book titlepages, first on the recto page and second on the following verso page. I made a simple extension to the “titlepage.templates.xml” file as proposed by Bob. Here is an XML snippet: <t:titlepage-content t:side="recto"> <mediaobject t:predicate="[position() = 1]"/> … <t:titlepage-content t:side="verso"> … <mediaobject space-before="1.5in" t:predicate="[position() = 1]" /> … When I do this with other elements (i.e. <author>), everything is fine. But if I do this with an image, the FOP complains about a previously used ID: “javax.xml.transform.TransformerException: org.apache.fop.fo.ValidationException: Property ID "N4000E" (found on "fo:block") previously used; ID values must be unique within a document!” I checked the FO-Output and indeed found the image block twice with the same ID (“N4000E”). For the other elements there is no problem, because they don’t get an ID (i.e. author). Question: How can I reuse my image more than once on the recto/verso title page. I could insert a second imageobject (same file) and fetch it with t:predicate="[position() = 2]” as a work around. But somehow I want to keep my code easy and clean. Can anyone help? Thanks. Ben
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