value

This integer attributes indicates the current ordinal value of the item in the list as defined by the <ol> element. The only allowed value for this attribute is a number, even if the list is displayed with Roman numerals or letters. List items that follow this one continue numbering from the value set. The value attribute has no meaning for unordered lists (<ul>) or for menus (<menu>).

Note: 

This attribute was deprecated in HTML4, but reintroduced in HTML5.

Prior to Gecko 9.0, negative values were incorrectly converted to 0. Starting in Gecko 9.0 all integer values are correctly parsed.