BS ISO 21806-2:2020 - Page 3

Road vehicles. Media Oriented Systems Transport (MOST). Application layer | Status: Current, Under review

1 Scope This document specifies a part of the application, the application layer, and the presentation layer. The application covers the

• — device model,
• — registry management,
• — connection management for streaming data,
• — diagnosis, and
• — error handling.

The application layer covers the structure of MOST messages consisting of

• — addressing,
• — function block identifiers,
• — instance identifiers,
• — function identifiers,
• — operation types, and
• — timing definitions.

The presentation layer covers the definition of data, basic data types and function classes.