Describes: - the technical requirements that must be met by the Terminology Management System (TMS) that will be used to manage and store the 'Agreed RMI Terminology'; - the requirements for the Registration Authority (RA) (ie the agency responsible for maintaining the publishing the 'Agreed RMI Terminology').

The ISO18542 series is structured into two parts:

• Part1: General information and use case definition: defines a framework and a process for agreeing terms

• Part2: Standardized process implementation requirements, Registration Authority: defines the process implementation requirements for a Terminology Management System and for a Registration Authority with a Digital Annex.

The purpose of the ISO18542 series is to facilitate searching by Independent Operators (IOs) of Vehicle Manufacturer (VM) Repair and Maintenance Information (RMI) websites.

This part of ISO18542 specifies:

• the technical requirements that must be met by the Terminology Management System (TMS) that will be used to manage and store the \'Agreed RMI Terminology\';

• the requirements for the Registration Authority (RA) (i.e. the agency responsible for maintaining and publishing the \'Agreed RMI Terminology\').

The framework and process for creating \'Agreed Terminology\' is the subject of ISO18542-1.

The target audience for this part of ISO18542-2 is a technical one, and focused on those responsible for the implementation of mandate M/421.