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| Element: | priorityClass |
| Attributes: | | abstract | alt | author | class | copyright | customTest | higher | id | longdesc | lower | pauseDisplay | peers | system-bitrate | system-captions | system-language | system-overdub-or-caption | system-required | system-screen-depth | system-screen-size | systemAudioDesc | systemBitrate | systemCaptions | systemComponent | systemCPU | systemLanguage | systemOperatingSystem | systemOverdubOrSubtitle | systemRequired | systemScreenDepth | systemScreenSize | title | |
Using priority classes to control the pausing behavior of children of the excl allows the author to group content into categories of content, and then to describe rules for how each category will interrupt or be interrupted by other categories. Attributes of the new grouping element priorityClass describe the intended interactions.