Overview
ISO/IEC 9834-4:1991 is an international standard developed by ISO and IEC that defines procedures for the operation of OSI Registration Authorities specifically for maintaining a register of Virtual Terminal Environment (VTE) profiles. VTE profiles are essential for ensuring unambiguous identification and consistent definitions within the Open Systems Interconnection (OSI) framework, particularly in relation to VT protocols governed by ISO 9041-1.
This part of the ISO/IEC 9834 series specifies the format and content requirements for register entries that document VTE profiles. Each profile is assigned a unique ASN.1 object identifier, ensuring global uniqueness and clarity in communications implementing VT protocols.
Key Topics
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Scope and Purpose
Defines the structure and content for entries in the international register of VTE profiles to unambiguously identify each profile by an ASN.1 object identifier.
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Registration Procedures
Specifies procedures for proposing, maintaining, and updating entries in the VTE profile register, following consensus-based methods akin to international standard approval, minus the need for final ISO/IEC council approval.
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Content of Register Entries
A typical register entry includes:
- Entry number and date
- Name of sponsoring authority
- Unique ASN.1 object identifier
- Descriptor value (human-readable profile description)
- Profile operation mode (A or S mode)
- Required and optional VT functional units
- Definitions and specifications of profile arguments including defaults and type
- Profile body detailing all VTE parameters, defined using BNF-style or equivalent
- Additional notes and usage guidelines
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Role of Registration Authority
The authority ensures technical correctness and completeness of the VTE profile entries and provides public access to registered information.
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Related OSI Standards Referenced
ISO 9040 (Virtual Terminal Basic Class Service), ISO 9041-1 (VT Basic Class Protocol), ISO/IEC 9834-1 (General Procedures for OSI Registration Authorities), and ISO/IEC 9834-5 (Register of VT Control Object Definitions).
Applications
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VT Protocol Implementation
Organizations developing or implementing VT protocols use registered VTE profiles to ensure compliance and interoperability of terminal emulation applications.
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System Developers
Software and hardware developers rely on unambiguous VTE profile definitions for integrating terminal features like display and device control in Open Systems Interconnection architectures.
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Standardization Bodies
Facilitates consistent global registration, management, and referencing of VTE profiles to avoid ambiguity or duplication, enhancing interoperability across vendor equipment.
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Network Management and Configuration
VTE profiles assist in establishing associations with clear parameters, improving management of terminal capabilities in broad networked IT environments.
Related Standards
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ISO 9040:1990 - Defines the Virtual Terminal Basic Class Service essential for understanding the service context of VTE profiles.
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ISO 9041-1:1990 - Specifies the Virtual Terminal Basic Class Protocol, detailing how profiles are used in protocol elements.
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ISO/IEC 9834-1:1991 - General procedures for OSI Registration Authorities, establishing the procedural framework for this part.
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ISO/IEC 9834-5:1991 - Register of VT Control Object Definitions, closely related for defining control objects used by VTE profiles.
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ISO/IEC 8824:1990 - Abstract Syntax Notation One (ASN.1) Specification used for syntax definitions and object identifier assignments critical to VTE-profile uniqueness.
Keywords: ISO/IEC 9834-4:1991, VTE profiles, OSI Registration Authority, ASN.1 object identifier, virtual terminal environment, Open Systems Interconnection, VT protocol, standardization, ISO 9041-1, terminal emulation profiles, virtual terminal management.
Open preview (PDF)Information technology — Open Systems Interconnection — Procedures for the operation of OSI Registration Authorities — Part 4: Register of VTE Profiles