Function and Query Evaluation with No XML Tags Error

[Wei, Alice J.]

Hi, XQueriers:

   I have here simplified my earlier XQuery function to as follows:

declare boundary-space preserve;
declare function local:distinct(
     $seq as xs:anyAtomicType*)
      as xs:anyAtomicType
 {
 for $doc in distinct-values($seq)
 order by $doc
 return
  <ad>{$doc} </ad>
 };

 for $ad in distinct-values(collection("xmldb:exist://db/cbml")//ad/p[contains(upper-case(.),'BOOK')])
 return
<ad>{local:distinct($ad)}</ad>

What I got now from the query evaluation:

<ad>CRAZY.. The Humor Book that
                        Knows No Boundaries!  </ad>

My intended output:

<ad>
        <p rend="bggreen">
<emph rend="bold yellow">CRAZY..</emph>
 The Humor Book that
                        Knows No Boundaries!
</p>
</ad>

Is it possible to put the XML tags back? What have I missed here?
Thanks to those who can help.

======================================================
Alice Wei
MIS 2008
School of Library and Information Science
Indiana University Bloomington
http://x-query.com/mailman/listinfo/talk