ISO/IEC 8571-5:1990 PDF

Overview

ISO/IEC 8571-5:1990 specifies a Protocol Implementation Conformance Statement (PICS) proforma for the File Transfer, Access and Management (FTAM) family of OSI application-layer standards. Often called the PIGS proforma in the text, this part of ISO/IEC 8571 provides the official template and instructions implementors must complete to declare conformance to ISO/IEC 8571 (FTAM). The proforma is produced in accordance with the conformance-testing guidance of ISO 9646-2, and requires identification details that uniquely tie a protocol implementation to its supplier and system environment.

Key topics and requirements

• Purpose: Provide a formal, structured PICS (Protocol Implementation Conformance Statement) proforma that implementors complete when claiming conformance to FTAM.
• Conformance rules: The proforma must follow ISO/IEC 8571-5 numbering and ordering and comply with guidelines in ISO 9646-2 for testable conformance statements.
• Identification detail: Requires implementor and supplier data, implementation name, platform/OS, contact information and relationship to any system-level conformance statement.
• Proforma structure: Sections cover
  • Implementation detail
  • General ISO 8571 detail (versions, addenda, defect reports)
  • Syntax detail
  • Virtual filestore detail
  • File protocol detail (PDUs, fields and options)
  • Document type detail (abstract syntaxes and file model support)
• Notation and columns: Uses D/I/R columns to indicate defined behavior and implemented support for Defined, Initiator, Responder roles; common entries include Y/N and codes for mandatory/optional/conditional support.
• Completion instructions: Implementors must complete ‘I’ and ‘R’ columns and reference additional supporting documentation where required. Annex A contains the normative PICS proforma for FTAM.

Practical applications and users

Who uses ISO/IEC 8571-5:

• Protocol implementors and vendors - to document exactly which FTAM features and options were implemented.
• Conformance test laboratories and certification bodies - to evaluate and verify FTAM conformance claims against a standardized PICS.
• Procurement teams and system integrators - to compare vendor capabilities and ensure interoperability requirements are met.
• Standards and QA engineers - to produce reproducible, testable evidence of compliance for interoperability testing.

Benefits:

• Ensures clear, testable declarations of FTAM implementation capability.
• Supports interoperability and repeatable conformance testing across vendors and sites.
• Provides a consistent procurement artifact for specifying required FTAM features.

Related standards

• ISO/IEC 8571-1 to -4 (FTAM general introduction, virtual filestore, file service, file protocol)
• ISO 9646-1 / ISO 9646-2 (Conformance testing methodology and abstract test suite guidance)
• ISO 7498 (OSI Basic Reference Model)
• ISO/TR 8509 (OSI service conventions)

Keywords: ISO/IEC 8571-5:1990, FTAM PICS proforma, Protocol Implementation Conformance Statement, PIGS proforma, OSI file transfer access management, ISO 9646-2, conformance testing, interoperability.