grouping list items by attribute

<tx.list style="ID1c6">
          <tx.li level="0" number="1.   ">
            <tx.p style="ID1a2">List1</tx.p>
          </tx.li>
          <tx.li level="0" number="2.   ">
            <tx.p style="ID1a2">List2</tx.p>
          </tx.li>
          <tx.li level="1" number="7    ">
            <tx.p style="ID1a2">Sublist 1</tx.p>
          </tx.li>
          <tx.li level="1" number="7    ">
            <tx.p style="ID1a2">Sublist 2</tx.p>
          </tx.li>
          <tx.li level="1" number="7    ">
            <tx.p style="ID1a2">Sublist 3</tx.p>
          </tx.li>
          <tx.li level="0" number="3.   ">
            <tx.p style="ID1a2">List3</tx.p>
          </tx.li>
        </tx.list>

<ol>
          <li>List1</li>
          <li>List2</li>
          <ul>
                  <li>Sublist 1</li>
            <li>Sublist 2</li>
            <li>Sublist 3</li>
          </ul>
          <li>List3</li>
        </ol>

My basic problem is I can't quite figure out how you can use an increase in
level to trigger the start of a new list.  Especially when the lists may be
nested much deeper and any level may be either ordered or unordered
lists.  Siblings at the same level I can do easily enough.

Lynn Alford                             Tel     (07) 47 81 6256
ITR                                             Email:  imla@xxxxxxxxxx
JCU QLD 4811 Australia                  ICQ: 64096907
MSN: nicarra60@xxxxxxxxxxx              Y!: nicarra60

'I think an "uncatched exception" deserves three bug reports: one for the
exception, one for not catching it, and one for abuse of the English
language.'  Michael Kay