Ordered lists (numbered), unordered lists (bullets) and description lists (defined terms) are all supported, and syntax generally follows HTML. Lists usually live within a paragraph (<p>), though there are limited exceptions. Their structure is given by the <ol>, <ul>, <dl> tags (respectively). These can specify a variety of options for the labels via attributes, as described in Section 6.9.
List items, for any of the three types, are delimited with the <li> tag. What is different from HTML is that the contents of a list item may be structured, with paragraphs (<p>) being the most likely. So to nest lists you begin a paragraph in a list item of the outer list, then begin the inner list within that paragraph. But a simple list item may be authored just like you were authoring within a paragraph, much like writing sentences elsewhere. For a description list, the list item must contain a <title>, which will become the text that is being described (the lable of the list item). Then the rest of the list item must be structured, say with paragraphs. A description list cannot be contained within another list.