ISO/IEC 13712-1:1995/Amd 1:1996 is an important international standard in information technology that addresses remote operations - specifically, it extends the original ISO/IEC 13712-1:1995 standard with Amendment 1, focusing on built-in operations utilized in ROSE-based applications. ROSE (Remote Operations Service Element) is a key component in distributed systems enabling remote invocation of operations.
This amendment introduces three built-in operations - Probe, Acknowledge, and Cancel - designed to provide general utility functions central to improving the robustness and management of remote operation interactions. The inclusion of these operations enhances the capabilities of ROSE implementations, supporting error handling, operation tracking, and termination requests.
Key Topics
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Built-in Operations Definition:
The amendment clearly defines the three key built-in operations:
- Probe: Queries the status of a previously invoked operation, returning whether it is running, finished, or unknown.
- Acknowledge: Confirms receipt of a return message from a non-idempotent operation invocation.
- Cancel: Requests premature termination of an ongoing operation, only applicable to operations marked as cancellable.
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Idempotency Concept:
A critical addition is the definition of idempotent operations - operations that can be invoked multiple times without causing state changes beyond the first invocation. This property is integral to Probe, Acknowledge, and Cancel operations to ensure consistency in distributed environments.
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Operation Class Extensions:
The OPERATION information object class is extended with new fields such as idemPotent, alwaysReturns, and invokePriority, supporting finer control and definition of operations in remote services.
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Error Handling:
Specific error types like cancelFailed and cancelled are introduced to manage cancellation-related failures and to signal successful cancellation events clearly.
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Protocol Synchronization:
The amendment specifies synchronous and asynchronous behavior defaults for operations, supporting correspondence between request and response messages reliably.
Applications
This amendment is highly relevant for developers, system architects, and designers working on distributed and networked applications, particularly those using ROSE-based protocols for remote method invocation. Practical applications include:
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Distributed Systems Management:
Enhance monitoring of remote operation statuses to handle retries, acknowledgments, and cancellations gracefully.
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Network Protocol Development:
Provide a standardized approach for managing operation lifecycles in protocol negotiation and execution.
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Telecommunication Systems:
Support improved interaction and control flows within open distributed processing, especially in systems requiring fault tolerance and operation tracking.
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Middleware and API Design:
Offer built-in operations that can be implemented in middleware layers facilitating reliable operation execution and error management.
Related Standards
- ISO/IEC 13712-1:1995 - The base standard detailing the concepts, models, and notations for remote operations.
- ITU-T Recommendation X.880 - The equivalent ITU-T recommendation aligned with ISO/IEC 13712-1, ensuring interoperability and international consensus.
- ISO/IEC JTC 1 Standards - Broader family of standards related to Open Systems Interconnection (OSI), data management, and distributed processing by the ISO/IEC Joint Technical Committee 1.
Summary
ISO/IEC 13712-1:1995/Amd 1:1996 provides essential extensions to the remote operation framework by defining built-in, idempotent operations - Probe, Acknowledge, and Cancel - that are critical for reliable remote service interoperability. These enhancements streamline the monitoring, acknowledgment, and cancellation of remote method invocations in distributed information technology systems, making this amendment invaluable for ROSE-based application designers seeking robust and standardized remote operation management.
Keywords: ISO/IEC 13712-1 amendment, remote operations, ROSE, built-in operations, probe operation, acknowledge operation, cancel operation, idempotent operations, distributed systems, remote invocation, international IT standards.