Note: Modules marked with (**) are new Modules added in SMIL3.0. Modules marked with (*) are revised modules from SMIL 2.1
| Module Name | specified in |
| AccessKeyTiming | SMIL 3.0 Timing |
| AlignmentLayout | SMIL 3.0 Layout |
| AudioLayout | SMIL 3.0 Layout |
| BackgroundTilingLayout | SMIL 3.0 Layout |
| BasicAnimation | SMIL 3.0 Animation |
| BasicContentControl | SMIL 3.0 ContentControl |
| BasicInlineTiming | SMIL 3.0 Timing |
| BasicExclTimeContainers | SMIL 3.0 Timing |
| BasicLayout (*) | SMIL 3.0 Layout |
| BasicLinking | SMIL 3.0 Linking |
| BasicMedia | SMIL 3.0 Media Object |
| BasicPriorityClassContainers | SMIL 3.0 Timing |
| BasicText (**) | SMIL 3.0 smilText |
| BasicTimeContainers | SMIL 3.0 Timing |
| BasicTransitions | SMIL 3.0 Transitions |
| BrushMedia | SMIL 3.0 Media Object |
| CustomTestAttributes | SMIL 3.0 ContentControl |
| DOMTimingMethods (**) | SMIL 3.0 Timing |
| EventTiming | SMIL 3.0 Timing |
| FillDefault | SMIL 3.0 Timing |
| FullScreenTransitionEffects | SMIL 3.0 Transitions |
| Identity (**) | SMIL 3.0 Structure |
| InlineTransitions | SMIL 3.0 Transitions |
| LinkingAttributes | SMIL 3.0 Linking |
| MediaAccessibility | SMIL 3.0 Media Object |
| MediaClipMarkers | SMIL 3.0 Media Object |
| MediaClipping | SMIL 3.0 Media Object |
| MediaDescription | SMIL 3.0 Media Object |
| MediaMarkerTiming | SMIL 3.0 Timing |
| MediaOpacity (**) | SMIL 3.0 Media Object |
| MediaPanZoom (**) | SMIL 3.0 Media Object |
| MediaParam (*) | SMIL 3.0 Media Object |
| MediaRenderAttributes (**) | SMIL 3.0 Media Object |
| Metainformation | SMIL 3.0 Metadata |
| MinMaxTiming | SMIL 3.0 Timing |
| MultiArcTiming | SMIL 3.0 Timing |
| MultiWindowLayout | SMIL 3.0 Layout |
| ObjectLinking | SMIL 3.0 Linking |
| OverrideLayout | SMIL 3.0 Layout |
| PrefetchControl | SMIL 3.0 ContentControl |
| RepeatTiming | SMIL 3.0 Timing |
| RepeatValueTiming | SMIL 3.0 Timing |
| RequiredContentControl (**) | SMIL 3.0 Content Control |
| RestartDefault | SMIL 3.0 Timing |
| RestartTiming | SMIL 3.0 Timing |
| SkipContentControl | SMIL 3.0 ContentControl |
| SplineAnimation | SMIL 3.0 Animation |
| StateInterpolation (**) | SMIL 3.0 State |
| StateSubmission (**) | SMIL 3.0 State |
| StateTest (**) | SMIL 3.0 State |
| Structure | SMIL 3.0 Structure |
| StructureLayout (**) | SMIL 3.0 Layout |
| SubRegionLayout | SMIL 3.0 Layout |
| SyncbaseTiming | SMIL 3.0 Timing |
| SyncBehavior | SMIL 3.0 Timing |
| SyncBehaviorDefault | SMIL 3.0 Timing |
| SyncMaster | SMIL 3.0 Timing |
| TextMotion (**) | SMIL 3.0 smilText |
| TextStyling (**) | SMIL 3.0 smilText |
| TimeContainerAttributes | SMIL 3.0 Timing |
| TimeManipulations | SMIL 3.0 Time manipulations |
| TransitionModifiers | SMIL 3.0 Transitions |
| UserState (**) | SMIL 3.0 State |
| WallclockTiming | SMIL 3.0 Timing |