In the Volume 1, the following revisions are implemented.

･Adding a ligature of the new era "Reiwa" (characters that contain two characters within a character width), in Part 2 which defines the character encoding system.

･Deleting the description about the transmission method of the resource file that is transmitted simultaneously with the ARIB-TTML document in order to match the transmission description with the operation related to caption presentation, in Part 3 which defines the subtitle / superimpose encoding system.

･Adding the description that the transmission method of the resource file which is transmitted simultaneously with the ARIB-TTML document is specified in the Technical Report.

In the Volume 1, the following revisions are implemented.

･Correcting the typographical errors about the namespace in Part 3, which defines the subtitle / superimpose encoding system, and making them consistent with the relevant Techniccal Report.

In the Volume 2, the following revision is implemented.

･Correcting the typographical errors that the specified data type description format for event information in the multimedia coding system language specification differs from the interface description language (WebIDL), and making them consistent with the relevant Techniccal Report.

In the Volume 1, the following revisions are implemented.

･Addition of the terminal linkage function in Part 1 which defines the reference model.

･Clarification of subtitle compression method in Part 3 which defines subtitle / superimpose encoding method.

･Addition of the full text XML Schema.

･Addition of the normative references and abbreviations.

･Addition of the MIME Type definition for use in communication services.

In the Volume 2, the following revision is implemented.

･Addition of the broadcasting extension functions to realize the terminal linkage functions added in Volume 1 which specifies the multimedia coding system language.

･Addition of the recording / playback status judgment function and the data event update notification function into the broadcasting extension functions, which are required for the multimedia service realization of Advanced Digital Satellite Broadcasting.

The version number is set to 2.0 due to a major revision.

In the Volume 1, the following revisions are implemented.

･Change the reference of additional symbols for EPG, which is assumed to be used in Advanced Digital Satellite Broadcasting, from Unicode Standard to ISO / IEC standard in accordance with the issuance of ISO / IEC 10646: 2017.

･Updating the relevant sections in Chapter 5 and Description 2 related to the above revision.

In the Volume 2, the following revision is implemented.

･Clarification of the handling about component_tag in the namespace among the broadcast extensions required for the multimedia service realization of Advanced Digital Satellite Broadcasting in the multimedia coding language specification.

EPG：Electronic Program Guide

In the Volume 1, the following revision is implemented.

･Clarification of the receiver reference model by adding the definition of the term “application engine” in the reference model specified in Part 1.

In the Volume 2, the following revision is implemented.

･Clarification of the provision about time-out for communication functions assuming TCP / IP among the broadcast extensions required for the multimedia service realization of Advanced Digital Satellite Broadcasting in the multimedia coding language specification.

TCP/IP：Transmission Control Protocol / Internet Protocol