They may appear in any order.
Attribute names are always case-insensitive.
Attribute values are generally case-insensitive. It allows content to stop being flowed around the floated element. No special line breaking effects are applied relative to the floating element. Breaks line after this element and moves down vertically until the right margin is clear of floated objects. Breaks line after this element and moves down vertically until the right margin is clear of floated objects.