		Introduction
		Outline
		FAQs

	SMIL Concepts

		Basics
		Advantages and Disadvantages
		Guidelines
		Media Components
		Bandwidth Considerations

	Layout

		The SMIL file
		Root Layout
		Playback Regions
		Layers
		Background Color

	Timing

		Parallel Clips
		Sequential Clips
		Begin and End
		Loops and Fills

	Practice

		Practice Part 1
		Practice Part 2
		Practice Part 3
		Practice Part 4

	Also See

		Glossary
		Request an A/V Consultation

	A/V Tutorials

		Resources
		Introduction
		Editing Audio
		Editing Video
		SMIL: Multimedia
		SMIL: Doing More
		Webcasts
		Publishing Files

	Vendor Sites

		Sonic Foundry
		Real Networks
		QuickTime

Sequential Clips

The sequence tag indicates that two or more clips should be played in sequence. These clips are referenced between the <seq> and </seq> tags. If you have a simple presentation where you provide a list of clips in the <body> of the SMIL file, you wouldn't need to use <seq> tags, as sequential playback of a list of clips is the default SMIL behavior.

Sequence tags are most often used with <par> tags to order groups of clips.

In the following example, the file one.gif will display, followed by two.gif, followed by three.gif and four.gif displaying together.

<seq>

<img region ="one"src= "rtsp://realserver.bu.edu:554/a/v/av/nis/training/smil/one.gif" />

<img region ="two" src= "rtsp://realserver.bu.edu:554/a/v/av/nis/training/smil/two.gif" />

<par>

<img region ="three" src= "rtsp://realserver.bu.edu:554/a/v/av/nis/training/smil/three.gif" />

<img region ="four" src= "rtsp://realserver.bu.edu:554/a/v/av/nis/training/smil/three.gif" />

</par>

</seq>

NIS | OIT | Boston University | October 24, 2002