They're simple...in a somewhat complicated way.
<simplelist> <member>Apples</member> <member>Oranges</member> <member>Pears</member> <member>Bananas</member> <member>Kiwi</member> </simplelist>
Inline, type="inline":
Inline, type="vert", columns="2":
| Apples | Bananas |
| Oranges | Kiwi |
| Pears |
Inline, type="horiz", columns="3":
| Apples | Oranges | Pears |
| Bananas | Kiwi |