[whatwg] Question about allowed <ol> and <ul> descendants

[Aaron Leventhal]

http://dev.w3.org/html5/spec/Overview.html#the-ol-element

 > Categories:Flow content 
<http://dev.w3.org/html5/spec/Overview.html#flow-content-0>
 > Contexts in which this element may be used: Where flow content 
<http://dev.w3.org/html5/spec/Overview.html#flow-content-0> is expected.
 > Content model: Zero or more |li 
<http://dev.w3.org/html5/spec/Overview.html#the-li-element>| elements.

Is there a conflict between these things? It seems that the <ul> and 
<ol> elements allow flow content.
On the one hand, that seems to allow many kinds of descendants, such as 
child lists. However, the content model says that only <li> children are 
expected.

What about nested lists, like this?
<ol>
<li>Apples</li>
<li>Oranges
<ol>
<li>Seeded</li>
<li>Navel</li>
</ol>
</li>
</ol>

I would think that's allowed. So, what kinds of content are allowed 
inside of <ol> and <ul>?

- Aaron