[xsl] Collecting sibling nodes under groupings

["Mark Wilson" <drmark@xxxxxxxxxxxxxxx>]

It was suggested that I resubmit my question with a more specific subject 
line.

I am building a library catalog for my club. I put each book's description 
in an XML sequence like (but simplified)
<List>
   <Entry>
       <Subject>Some Subjects</Subject>
       <Title>Some Title</Title>
       <Publisher>Some Publisher</Publisher>
   </Entry>
   .......
</List>

Using Saxon 8, I then did a grouping using XSLT 2.0's new grouping element 
so that I get a list of all the subjects, but only a single entry for each. 
Now I want to create:
<List>
   <Subject>First Subject
       <Title> First title associated with this subject</Title>
           <Publisher>Publisher associated with this title</Publisher>
       <Title> Next title associated with this subject</Title>
            <Publisher>Publisher associated with this title</Publisher>
   </Subject>
   .....
</List>
More to the point, I want to collect all of the sibling nodes from an entry 
with all of the sibling nodes from other entries that share the same subject 
value. I have really looked and just failed to understand what I am looking 
at. The examples appear to show how to collect attributes, but not how to 
collect sibling nodes. My attemps have all failed.
Thanks,
Mark