Per MIL-STD-2500C Change Notice 2 Section 5.8, all data extensions shall be controlled or registered with NGA’s NITF Technical Board (NTB). The register below is NTB’s registry of controlled and registered Data Extension Segments (DES)s. Any data extension not controlled or registered with the NTB is not valid for implementation.

New extensions shall be submitted to the NTB for control or registration. Extensions deemed by NTB as essential to the NITF product’s interoperability and use by anticipated and unanticipated systems and users, respectively, will be overseen by NTB’s configuration management. Extensions deemed by NTB to be only essential to the production source and immediate systems/users will be registered. For more information, follow the link: TRE / DES Submission.

The register lists the Unique Extension Type Identifier for controlled, registered, reserved, and reported extensions. This is to ensure identifiers remain unique to avoid interoperability risks. The following section define types and statuses for extensions:

• Type:

• Controlled:	Extensions controlled by the NTB for community use.
  Registered:	Extensions registered with the NTB for private use.
  Reserved:	Extensions not yet deemed by NTB to be controlled or registered.
  Reported:	Extensions observed in fielded systems and not registered the NTB.

• Status:

• • Approved:	Extensions approved by the NTB for implementation.
    Pending:	Extensions pending NTB’s review.
    Canceled:	Extensions where the submitter or NTB canceled development.
    Retired:	Extensions no longer valid for implementation.
    Invalid:	Extensions not approved by NTB for implementation.