OptionalcharacteristicsThis is a list of enumerated CharacteristicEnum values that indicate a purpose, trait or feature associated with the Track. A value of null shall indicate that there are no Characteristics corresponding to the Track.
OptionaldisplayThe value is a String containing a user displayable name for the Track. A value of null shall indicate that there is no DisplayName corresponding to the Track.
The value is a String containing one of the standard Tags for Identifying Languages RFC 5646, which identifies the primary language used in the Track.
This structure includes the attributes associated with a Text/Audio Track
See
MatterSpecification.v13.Cluster § 6.10.5.6