head Element

The head element of the SMIL document contains information that is not related to the temporal elements of the presentation. Thus, it contains layout information, such as the settings of the presentation window and the locations and sizes of the media components.
The head element must begin with <head> and end with <\head>.
The head element can have three children: layout, meta, and switch. It can contain any number of meta elements and either a layout or a switch element.