Viewports 'Visible' property vs DSSSL

[geirog@xxxxxxxx]

Hello!

A sample instance:

<Doc>
   <Title>Document title (I want this in my output)</Title>
      <Chapter>
         <Title>Chapter title (I want this in my output)</Title>
         <Para>No, I don't want this in my output</Para>
         <Para>No, I don't want this in my output</Para>
         <Note>No, I don't want this in my output</Note>
         ...
         other elements
         ...
      <Section>
         <Title>Section title (I want this in my output)</Title>
         <Para>No, I don't want this in my output</Para>
         <Footnote>Yes, I want this in my output</Footnote>
         <Para>No, I don't want this in my output</Para>
         ...
         other elements
         ...
      </Section>
   </Chapter>
</Doc>


How can I express, in DSSSL, that any subelement of Chapter except 
a given list of elements (I don't know who they are) should be 
discarded, independent of what content model the element Chapter has?

E.g. I want to discard the content of Chapter and its subelements 
except for the Title and Footnote elements.

Or perhaps there is a way to override an empty-sosofo? If the 
element Chapter was an empty-sosofo, how could I override this 
for the elements Title and Footnote. (This would simplify my
processing)

The reason why I'm asking these questions is that I'm trying to 
convert Viewport stylesheets to DSSSL specs. 

In some of the stylesheets the Visible property has been set, e.g. 
the Chapter style has been set to 'Hide' while Title and Footnote
has been set to 'Show'. The rest are inherited. 

My problem is that I don't know anything about the DTD when I'm 
processing the Viewport stylesheets.

(Sorry about the capricious DSSSL terminology...) 

Cheers,

</Gr0ve>

------------------  Geir Ove Grønmo  ------------------
  Falch Infotek as, Stanseveien 21, 0902 Oslo, Norway
      Phone: +47 22 90 27 36 Fax: +47 22 90 25 99
 [grove@xxxxxxxx | http://www.falch.no/people/geirog]
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