TTML Named Item Registry
ttm:item element can be used to
express arbitrary metadata that applies to a parent element.
This page provides a registry for
<item-name> values in order to promote interoperability.
Standard TTML Item Names
The above values are standard values, defined by TTML2 unqualified by a namespace. Note that all other values unqualified by a namespace are reserved for standardization.
Custom TTML Roles
Any future item name values will be added to this registry below.
There are currently no additional values in this registry.