Timesheets is the new
SMIL 3.0 External Timing module,
which allows the integration of SMIL timing with other
XML languages such as XHTML and SVG.
Timesheets is based on the SMIL time containers
In addition, timesheets introduces two elements timesheet and item.
timesheet element contains all the timing information.
It can be located, for example, in the head section of XHTML document.
It can also reference timing information, which is located in an external file.
item element contains references to the timed elements, for example,
in XHTML body sections.
The timed elements are selected using CSS selectors.