Source of modifyText.smil
<smil xmlns="http://www.w3.org/2001/SMIL20/Language">
<head>
<meta name = "title"
content = "Modifying the text" />
<layout>
<root-layout height = "300"
width = "400"
backgroundColor = "blue" />
<region id = "mainRgn"
left = "10%"
top = "5%"
height = "70%"
width = "80%"
backgroundColor = "red" />
<region id = "textRgn"
left = "10%"
top = "80%"
height = "15%"
width = "80%"
backgroundColor = "green" />
</layout>
</head>
<body>
<par>
<img src = "water.gif"
region = "mainRgn"
dur = "5s" />
<text src = "data:,This%20is%20an%20animated%20gif"
region = "textRgn"
dur = "5s" >
<param name = "fontFace"
value = "comic sans ms" />
<param name = "fontColor"
value = "blue" />
<param name = "backgroundColor"
value = "yellow" />
<param name = "fontSize"
value = "5" />
</text>
</par>
</body>
</smil>