XSL-FO and XML: Bibel Bookname in Header on every Page

I'm having trouble with XSL-FO and XML. I am actually quite new to this area. But I already love it as far as I can understand.

My problem is this, and I've tried everything so far: I want the current Bible book name to appear in the header of every page until a new one starts.

I have the XSL and XML code here: https://xsltfiddle.liberty-development.net/nb9PtDi/17

Are there possibilities? What do I have to change in the code?

Solution

Look at fo:marker and fo:retrieve-marker (see https://www.w3.org/TR/xsl11/#fo_marker).

A copy of the book name would go in the fo:marker at the start of the first FO for the book, and the fo:static-content for the header would include an fo:retrieve-marker with a retrieve-class-name that matches the marker-class-name of the fo:marker that you added.

A search for questions about fo:marker will get you some examples of what to do.

I have fiddled with it at https://xsltfiddle.liberty-development.net/nb9PtDi/21

I added an fo:marker in the template for CAPTION (some properties omitted for clarity):

<xsl:template match="CAPTION">
  <fo:block page-break-before="always">
    <fo:marker marker-class-name="caption">
      <xsl:apply-templates />
    </fo:marker>
    <xsl:value-of select="."/>
  </fo:block>
</xsl:template>

and replaced the "HEADER" text with an fo:retrieve-marker (some properties omitted for clarity):

<fo:static-content flow-name="kopf">
  <fo:block>
    <fo:retrieve-marker retrieve-class-name="caption" />
  </fo:block>
</fo:static-content>

The connection between the two is the marker class name of "caption".

You don't seem to need them, but you can set the retrieve-position and retrieve-boundary properties on fo:retrieve-marker to control what happens when, for example, there's two fo:marker on the same page.