The float property specifies whether a box should float to the left, right, or not at all.
|before||Specifies that the box shall be descendant of a before-float-reference-area generated by a sub-region of a region-body|
|start||Specifies that the box shall float toward the start-edge of the reference area|
|end||Specifies that the box shall float toward the end-edge of the reference area|
|left||Specifies that the box shall float to the left. Content flows on the right side of the box. Interpreted as float='start'|
|right||Specifies that the box shall float to the right. Content flows on the left side of the box. Interpreted as float='end'|
|none||Default. The box is not floated|