REF-061: OAIS - Open Archival Information System Reference Model

Citation

Consultative Committee for Space Data Systems (2024). Reference Model for an Open Archival Information System (OAIS). CCSDS 650.0-M-3. ISO 14721:2025.

CCSDS: https://public.ccsds.org/Pubs/650x0m2.pdf ISO: ISO 14721:2025

Document Profile

Attribute	Value
Year	2002 (original), 2024 (v3)
Type	ISO Standard / Reference Model
Adoption	Global standard for digital preservation
AIWG Relevance	Medium - Provides archival lifecycle model for research artifacts; SIP/AIP/DIP pattern applies to research ingestion

Executive Summary

The Open Archival Information System (OAIS) Reference Model is the international standard (ISO 14721) for digital archives. It defines information packages (SIP, AIP, DIP) and functional entities (Ingest, Storage, Access, etc.) for long-term digital preservation. Despite originating from space data systems, OAIS has become the universal framework for digital preservation.

Key Insight

"The OAIS Reference Model has been widely adopted by a broad range of non-space agencies as a general model of a preservation system for both analog and digital data objects."

AIWG Implication: OAIS terminology and patterns provide a proven framework for thinking about research artifact lifecycle—even if AIWG doesn't implement a full archival system.

Core Concepts

Information Packages

Package	Acronym	Definition	AIWG Analog
Submission Information Package	SIP	Package delivered by producer to archive	Research source intake (PDF, URL)
Archival Information Package	AIP	Complete preserved package in archive	`.aiwg/research/sources/` with full metadata
Dissemination Information Package	DIP	Package sent to consumer on request	Export format (BibTeX, REF-XXX.md)

Package Flow

Producer → SIP → [Ingest] → AIP → [Access] → DIP → Consumer

For AIWG:

Researcher → Source → [Acquisition] → Documented Reference → [Integration] → Citable Claim

Six Functional Entities

Entity	Responsibilities	AIWG Analog
Ingest	Accept SIPs, create AIPs, validate	Research Acquisition
Archival Storage	Store, manage, retrieve AIPs	`.aiwg/research/` directory structure
Data Management	Maintain metadata, support queries	INDEX.md, search commands
Access	Discovery, DIP generation	Integration, export commands
Administration	Policy, operations, audit	Framework configuration
Preservation Planning	Monitor, recommend actions	Quality assessment, gap analysis

Preservation Description Information (PDI)

Five Categories

Category	Purpose	AIWG Implementation
Reference	Identifiers (DOIs, URIs)	REF-XXX identifiers, DOIs
Provenance	History (who, what, when)	`.aiwg/research/provenance/`
Context	Relationship to other info	Cross-References section
Fixity	Data integrity (checksums)	`checksums.json`
Access Rights	Permissions/restrictions	License documentation

Key Findings for AIWG

1. Package Transformation is the Model

Research artifacts transform through stages:

SIP: Raw source (PDF, URL, paper)
AIP: Documented reference (REF-XXX.md with metadata)
DIP: Integrated output (citable claims, synthesis)

AIWG Implication: Design research framework around explicit transformations between stages.

2. Metadata Must Persist

"Metadata should be accessible even when the data are no longer available." (Related to FAIR A2)

AIWG Implication: REF-XXX.md summaries must contain enough information to be useful even if the original PDF becomes unavailable.

3. Functional Separation

OAIS separates concerns: Ingest ≠ Storage ≠ Access ≠ Preservation Planning.

AIWG Implication: Research Acquisition, Documentation, Integration, and Archival should be separate concerns with clear handoffs.

AIWG Implementation Mapping

OAIS Concept	AIWG Implementation	Rationale
SIP (Submission)	PDF download, URL capture, raw source	Initial intake form
AIP (Archival)	REF-XXX.md with full metadata, checksums, provenance	Complete documented reference
DIP (Dissemination)	Citable claims index, BibTeX export, synthesis docs	Output formats for use
Ingest	Research Acquisition commands	Standardized intake process
Archival Storage	`.aiwg/research/sources/`, `pdfs/` directories	Organized storage structure
Data Management	INDEX.md, topic categorization, search	Discovery and query
Access	Integration commands, export formats	Getting information out
Administration	Framework registry, configuration	Policy and settings
Preservation Planning	Quality assessment, gap analysis	Maintaining coverage
PDI-Reference	REF-XXX identifier, DOI	Persistent identification
PDI-Provenance	Provenance records (REF-058 R-LAM)	History tracking
PDI-Context	Cross-References section	Relationship documentation
PDI-Fixity	SHA-256 checksums	Integrity verification
PDI-Access Rights	License field in Document Profile	Usage rights

Specific AIWG Design Decisions Informed by OAIS

1. Three-Stage Research Lifecycle

Decision: Acquisition → Documentation → Integration mirrors SIP → AIP → DIP.

OAIS Justification: Proven lifecycle model that separates concerns and enables quality gates between stages.

2. Metadata Completeness Requirements

Decision: REF-XXX.md documents must contain sufficient information to be useful without the original PDF.

OAIS Justification: OAIS requires AIPs to be self-sufficient. If the PDF disappears, the metadata (summary, key quotes, findings) remains valuable.

3. Fixity Implementation

Decision: Generate SHA-256 checksums for all PDFs; store in `checksums.json`.

OAIS Justification: PDI-Fixity enables verification that stored artifacts haven't been corrupted or modified.

4. Separate Functional Concerns

Decision: Different commands for different functions:

`/research-acquire` for Ingest
`/research-document` for Documentation
`/research-integrate` for Access
`/research-gap-analysis` for Preservation Planning

OAIS Justification: Functional separation enables focused tooling and clear responsibility.

5. Context Preservation

Decision: Every REF-XXX document includes Cross-References section with explicit relationship types.

OAIS Justification: PDI-Context ensures relationships between artifacts are preserved, not just the artifacts themselves.

Research Framework Application

Archival Package Structure

# .aiwg/research/sources/REF-056/package.yaml
archival_package:
  identifier: REF-056
  version: 1.0.0

  content_information:
    primary: pdfs/REF-056-wilkinson-2016-fair.pdf
    supplementary:
      - docs/references/REF-056-fair-guiding-principles.md

  preservation_metadata:
    reference:
      ref_id: REF-056
      doi: 10.1038/sdata.2016.18
      url: https://www.nature.com/articles/sdata201618

    provenance:
      acquired: 2026-01-25
      acquired_by: research-acquisition-agent
      source_url: https://www.nature.com/articles/sdata201618.pdf

    fixity:
      pdf_sha256: abc123...
      md_sha256: def456...
      verified: 2026-01-25

    context:
      related_refs: [REF-061, REF-062]
      topic_categories: [data-management, reproducibility]

    access_rights:
      license: CC-BY-4.0
      restrictions: none

Lifecycle Stages

OAIS Stage	Research Framework	Commands
Pre-Ingest	Discovery, prioritization	`/research-discover`
Ingest	Acquisition, validation	`/research-acquire`
Archival Storage	Documentation	`/research-document`
Data Management	Indexing, search	`/research-search`
Access	Integration, export	`/research-integrate`
Preservation Planning	Gap analysis, quality	`/research-gap-analysis`

Key Quotes

On scope:

"OAIS provides information professionals with a conceptual framework of a preservation system, as well as a vocabulary of standardized terms."

On adoption:

"The OAIS Reference Model has been widely adopted by a broad range of non-space agencies as a general model of a preservation system."

On information packages:

"SIP: An Information Package delivered by the Producer to the OAIS for use in constructing Archival Information Packages."

Cross-References

Paper	Relationship
REF-056	FAIR provides access/discoverability principles; OAIS provides preservation
REF-062	W3C PROV implements OAIS PDI-Provenance category
REF-058	R-LAM applies preservation concepts to workflow reproducibility

Revision History

Date	Author	Changes
2026-01-25	Research Acquisition	Initial AIWG-specific analysis document