[docbook] Newbie question

[Jochen Witte <jwitte at alpha-lab dot net>]

Hello,

I am a newbie, trying to get some pdf-slides out of docbook. Here is my
docbook-xml:
---snip---
<?xml version="1.0" encoding="ISO-8859-15"?>
<!DOCTYPE slides PUBLIC "-//Norman Walsh//DTD Slides XML V3.1.0//EN"
"http://docbook.sourceforge.net/release/slides/3.1.0/schema/dtd/slides.dtd";>
<slides>
  <slidesinfo>
    <title>Testslides</title>
  </slidesinfo>
                                                                                
  <foilgroup>
    <title>test Foilgroup</title>
                                                                                
    <foil>
      <title>Test Foil</title>
                                                                                
      <para>test123</para>
    </foil>
  </foilgroup>
</slides>
---snip---

When trying to use the plain.xsl from slides I simly get:
---snip---
You must specify the sf-relid as a parameter.
Processing terminated by xsl:message at line 42
---snip---

What does this mean; what do I need to do?

Thanks in advance
Jochen

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Jochen Witte
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