rtftohtml knows about the following lists (in braces is the name of the respective paragraph style it expects such lists to be formatted with):
Nested lists can be created from an RTF document by using a different style for each level of indentation. The styles "bullet list 1" "numbered list 2" ... represent different levels of nesting, with "bullet list 1" being at nesting level 1. The only rule for use is that no levels of nesting are skipped. For example, a "numbered list 3" paragraph must not appear immediately after a "Normal" paragraph. It must follow a paragraph with a nesting level of 2 or higher.
An example sequence of paragraph styles to produce a nested list might look like this:
numbered list bullet list 1 bullet list 2 glossary 2 bullet list 1 numbered list 2