You can get a lot more information from
http://www.w3.org/AudioVideo/.
For starters, let's review the NMIT-generated SMIL:
"http://www.w3.org/2001/SMIL20/SMIL20.dtd">
Adding Spice to Messages: MMS
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Understanding SMIL Elements
Let us review the elements of the SMIL code we just saw:
The first three lines define the XML document type and the SMIL
namespace??”very similar to XHTML.
The head element defines the layout of the presentation. There are two
regions in our presentation, one for the image and the other for the text. The
layout element also defines the size.
The ID attribute in region is important. We must use the same ID in the img
or text elements for the item to be placed in that region.
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