This Recommendation | International Standard defines the Message Store abstract-service. This abstract-service is provided by the Message Store access protocol (specified in ITU-T Rec. X.419 | ISO/IEC 10021-6) in conjunction with the MTS abstract-service (defined in ITU-T Rec. X.411 | ISO/IEC 10021-4), together with the Remote Operations Service Element (ROSE) services (defined in ITU-T Rec. X.219 | ISO/IEC 9072-1). The abstract-syntax for the application-layer protocols used in this Recommendation | International Standard is defined in ITU-T Rec. X.680 | ISO/IEC 8824-1.

Other Recommendations | parts of ISO/IEC 10021 define other aspects of the MHS. ITU-T Rec. F.400/X.400 | ISO/IEC 10021-1 defines the user-oriented services provided by the MHS. ITU-T Rec. X.402 | ISO/IEC 10021-2 provides an architectural overview of the MHS. ITU-T Rec. X.420 | ISO/IEC 10021-7 defines the abstract-service for Interpersonal Messaging and defines the format of Interpersonal Messages.

Section 2 of this Recommendation | International Standard contains the Message Store abstract-service definition. Clause 6 describes the MS model. Clause 7 defines the semantics and abstract-syntax of the MS-bind and the MS-unbind abstract-operations. Clause 8 defines the semantics and abstract-syntax of the operations of the MS abstract-service. Clause 9 defines the semantics and abstract-syntax of the errors of the abstract-service.

Section 3 of this Recommendation | International Standard defines the general-attribute-types, general-matching-rules, and general-auto-action-types related to the MS. Clause 10 contains an overview. Clause 11 defines the semantics and abstract-syntax of the general-attribute-types. Clause 12 defines the semantics and abstract-syntax of the general-matching-rules. Clause 13 defines the semantics and abstract-syntax of the general-auto-action-types.

Section 4 of this Recommendation | International Standard describes the procedures for Message Store and the ports realization. Clause 14 contains an overview. Clause 15 describes how the Message Transfer System abstract-service is consumed. Clause 16 describes how the Message Store abstract-service is supplied. Clause 17 describes how the MS ports are realized.

The requirements for conformance to this Recommendation | International Standard are stated in clause 10 of ITU-T Rec. X.419 | ISO/IEC 10021-6.