SMPTE 429-5-2009

This standard specifies the format of a Timed Text Track File for the distribution of D-Cinema timed text content using the Material Exchange Format (MXF). The Track File is a container for an XML document and optional support resources such as images or fonts. Encryption is optionally available for protecting against unauthorized disclosure of the file contents.

The standard defines data structures for interchange at the signal interfaces of networks or storage media, but does not define internal storage formats for compliant devices.