body Element (Cont'd)

par

The par element is enclosed in <par> tags and allows several media objects to be played at simultaneously. Its children are executed in parallel.
The order of appearance of the children of a par element has no effect on the timing of their presentation.
The "begin" and "end" values of children of a par element are relative to the beginning of the par element. Two types of values can be assigned to "begin" and "end": a delay-value or an event-value. A delay-value is a clock value, and the par element will begin/end at the specified time after its parent begins. If the value is an event-value, a specified id and time is associated with the "begin"/"end" attribute. The par element would then start/end at the time given relative to the element of the specified id.
The "abstract" attribute of the par element gives a brief description of the content contained in the element.
The "author" attribute gives the name of the author of the content contained in the element.
The "copyright" attribute gives copyright information of the content.
The "dur" attribute specifies the explicit duration of the element.
The "end" attribute specifies the explicit end time of the element.
The "id" attribute gives a unique id to the element.
A par element can have the following children: animation, audio, img, ref, text, textstream, video, a, par, seq, and switch.

example

 <smil>
   <head> 
   .
   .
   .
   </head>
   <body>
     <par begin = "1s" >
       <img src = "mypic.gif", dur = "10s", begin = "1s", region = "reg1" \>
       <img src = "yourpic.gif" begin = "3s", dur = "15s", region = "reg2" \> 
     </par>
   </body>
 </smil>