Valid test resources:

• Include a ttp:contentProfiles attribute on the <tt> element including at least one value equal to a content profile designator specified at 5.6.1 Profile Designators, of which there is currently exactly one: http://www.w3.org/ns/ttml/profile/dapt1.0/content
• May also include other values - suggest a test resource without other values and another with other values

Expect >=2 valid test resources

Invalid test resources:

• Omit the ttp:contentProfiles attribute from the <tt> element OR
• Have a ttp:contentProfiles attribute on the <tt> element but that does not contain a DAPT content profile designator
  • Arguably this does not fail by the wording of #contentProfiles-root but it does fail the requirements of §5.6.2 ttp:contentProfiles

Expect >=2 invalid test resources

Presentation semantics:

There are no presentation semantics associated with this feature.