(registered 2019-03-07, last updated 2019-03-07) Type name: application Subtype name: atsc-rsat+xml Required parameters: None. Optional parameters: None. Encoding considerations: Binary. Same as for application/xml, except constrained to UTF-8. See IETF 7303, Section 9.1. Security considerations: This media type inherits the issues common to all XML media types – see RFC 7303 [10] Section 10. This media format is used to describe broadcast and broadband services. This format is highly susceptible to manipulation or spoofing for attacks desiring to mislead a receiver about a session. Both integrity protection and source authentication is recommended to prevent misleading of processors. This type does not employ executable content, but since it is explicitly extensible then executable content could appear in an extension. This media type does not provide any confidentiality protection and instead relies on the transport protocol that carries it to provide such security, if needed. This media type may also include a URL reference - RSATInetURL - which if present must be dereferenced in order to properly interpret the referenced content. This creates additional security considerations. Decoders should make every effort to validate the origin against other transport signaling. Interoperability considerations: The published specification describes processing semantics that dictate behavior that must be followed when dealing with, among other things, unrecognized elements and attributes, both in the document’s namespace and in other namespaces. Because this is extensible, conformant processors may expect (and enforce) that content received is well-formed XML, but it cannot be guaranteed that the content is valid to a particular DTD or Schema or that the processor will recognize all of the elements and attributes in the document. Published specification: This media type registration is an integral part of ATSC A/200, “Regional Service Availability”, Annex C. The payload is defined in Section 5.1. This specification and XML schema for the content are available at www.atsc.org/standards (the schema(s) are provided in a zip file). Applications that use this media type: ATSC 3.0 television and Internet encoders, decoders and other facility and consumer equipment. Additional information: File extension(s): .rsat Person & email address to contact for further information: Editor, Advanced Television Systems Committee (jwhitaker&atsc.org) Intended usage: COMMON Restrictions on usage: None Author: ATSC. Change controller: ATSC.