Updating XML

I am trying to insert some elements into a XML file, but I don't
know exactly how the XML looks like, I only know the DTD.
So I tried to break it down and got a working stylesheet, but it
seems not to be a very good solution, I always use
not(name() = 'elementname') and I think that there might be a better
and simpler solution. I tried somesthing like not(elementname), but
this does not work. The following is the style, I deleted some elements
to check for, the original checks for some more elements, but this
will show what I mean.

<xsl:template match="section | chapter">
   <xsl:copy>
      <xsl:apply-templates select="@*"/>

       <!-- apply all elments except section, simplesect, index and
             bibliography, but also apply index and bibliography, if
             they are followed by an element which is not index or
             bibliography -->
      <xsl:apply-templates select="*[(
                  not(name() = 'section') and
                  not(name() = 'simplesect') and
                  not(name() = 'index') and
                  not(name() = 'bibliography')
                  ) or (
                  (
                  name() = 'index' or
                  name() = 'bibliography'
                  ) and
                  following-sibling::*[
                     not(name() = 'index') and
                     not(name() = 'bibliography')
                     ])]"/>

       <!-- do something -->
      <para role="annotation.new"/>

      <!-- now apply section, simplesect and all index and
            bibliography elements, which are not followed
            by an element which is other than index or bibliography. -->
      <xsl:apply-templates
      select="section | simplesect | *[
         (
            name() = 'index' or
            name() = 'bibliography') and
         not(following-sibling::*[not(
         name() = 'index' or
         name() = 'bibliograpy'
         )])]"/>

   </xsl:copy>
</xsl:template>

Has anybody an idea how to make the above style a little more simple?
Or how to get the same result an easier way?