No, you shouldn't need to process them twice.  In the sample I sent, I just had code to output the title so I could see that it worked, but you could just as easily replace that with

<xsl:for-each select="//TitleWork ">
   <c01 level="file">
      <did>
         <unittitle><xsl:value-of select="roles[1]/Name-Role[1]/party[1]/@xl:title"/></unittitle>
         ...[etc. whatever]
      </did>
   </c01>
</xsl:for-each>

and it should output them in the order you want.

Michele

---- Marsha Maguire <[log in to unmask]> wrote: 
> Hi, Michele and anyone else who might be interested,
> 
> Michele, re. my XSLT emails of last week and your kind replies: I want to
> convert all the source TitleWork records in my source file to EAD <c01>
> entries. The finding aid will describe a collection that consists of sound
> recordings of interviews. I want those <c01> descriptions presented in
> order by the surname of the main person (or name of the musical group)
> interviewed, and that info is in (here's the full path):
> 
> /mavis/TitleWork/roles/Name-Role[1]/party[1]/@xs:title     [I hadn't
> thought to filter both Name-Role and party to the first instance of each -
> thank you!]
> 
> If I sort the TitleWork "records" in the same stylesheet that converts them
> to EAD <c01> descriptions, will I need to process the <TitleWork> elements
> a second time? E.g.,
> 
> <xsl:for-each select="//TitleWork">
>             <c01 level="file">
>                 <did> ...
> 
> I thought that wasn't possible unless the "mode" attribute was used with
> either xsl:template or xsl:apply-templates. I'm leery of
> xsl:apply-templates because it sets off the default templates, and really,
> I don't want most of the elements in each source TitleWork record in the
> resulting EAD. The source TitleWork records as exported from our
> collections management system is over 500 lines long; I'm just using a few
> elements and attributes from the source in the resulting <c01> entries. Of
> course, the stylesheet I wrote to try to sort *and* copy over the full
> exported source document also processes some elements twice, right? Which
> is probably why it isn't working, either -- ?
> 
> Thanks again, so much.
> 
> Marsha Maguire