All the objects within a group are nested within a group element. Each element within the group is defined in the same way as ungrouped elements. Group elements can be nested within other group elements.
A group element can contain any number of any other graphic object elements, but can be treated as a single object. Group attributes belong to the group as a whole, while each of the graphic object elements retains its own attributes. However, if animation is applied to the group, group animation will take precedence over object animation if the two conflict.
A group element must be within the gfx element or another group element.