body Element (Cont'd)

Media Object Elements (Cont'd)

anchor

The anchor element can break up the object into spatial or temporal subparts, associate a link destination to spatial and temporal subparts of a media object, and can make a subpart of a media object the destination of a link.
Using the "coords" attribute, the anchor element allows breaking up an object into spatial subparts. The value of the "coords" attribute specifies a rectangle within the display area of the media object. The rectangle is specified using four length values: the coordinates of the upper left hand corner of the rectangle and the coordinates of the lower right hand corner. The coordinates are relative to the top left corner of the media object. The coordinates can also be specified as percentage values, in which case it is relative to the total width or height of the media object display area.
The "begin" and "end" attributes can be used to break up the object into temporal subparts. "begin" specifies the explicit begin time of the subpart, and "end" specifies the explicit end time. These values are relative to the beginning of the media object.
Using the "href" attribute, the anchor element can associate a link destination to the spatial and temporal subparts of the media object. The URI of the link is the value of the attribute.
The "id" attribute allows the anchor element to make a subpart of a media object the destination of a link. It gives a unique XML identifier to the subpart.

example

 <smil>
   <head> 
   .
   .
   .
   </head>
   <body>
    <video src = "http://www.mysite.com/myvideo" > 
      <anchor href= "http://www.mysite.com/clipone", begin = "10s", end = "30s" />
      <anchor href= "http://www.mysite.com/cliptwo", begin = "30s", end = "50s" />
    </video>
   </body>
 </smil>