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CCSDS/ISOProducer-Archive Interface Methodology

Abstract Standard

Don Sawyer /NASA/NSSDC

30 October 2002

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PurposePurpose

Standardize the relationships and interactions between an information Producer and an Archive— Abstract Model

— Terms and Concepts Define a methodology

— Allows all actions to be structured within this context— Covers times from first contact by Producer until all

information objects are received by the Archive

Provide guidance on the specialization of the methodology to meet the needs of classes of archives, or of specific archives

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Model View of an OAIS EnvironmentModel View of an OAIS Environment

OAIS(archive)

Management

Producer Consumer

Producer is the role played by those persons, or client systems, who provide the information to be preserved

Management is the role played by those who set overall OAIS policy as one component in a broader policy domain

Consumer is the role played by those persons, or client systems, who interact with OAIS services to find and acquire preserved information of interest

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ScopeScope Identifies different phases in process of transferring

information between Producer and Archive Defines objectives of each phase

— Actions to be carried out during each phase— Expected results from end of each phase

General framework able to be re-used for all processes related to Producer-Archive interactions

Basis for development of additional related standards Basis for development of software tools to assist in

different stages of the interactions between Producer and Archive

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ApplicabilityApplicability

All archives conformant to OAIS Reference Model

May be of interest to archives not conformation to OAIS Reference Model

Relevant to archives holding physical as well as digital materials

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Methodology ConformanceMethodology Conformance

Methodology used by an archive for a particular ‘archive project’ (acquiring a set of information)– Conforms when all actions in this standard have been

considered and implemented as appropriate

Methodology has been specialized or extended to be a Community Standard, it conforms when:– All actions have been considered and incorporated

appropriately

– Methodology for creating the Community Standard has addressed the various work phases defined in section 4

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Document OrganizationDocument Organization Section1

— Purpose, Scope, Applicability, Conformance Section 2— Overview of methodology, players, their relationships, activity phases

Section 3— Detailed analysis of the four phased defined

• Preliminary definition phase• Formal phase• Transfer Phase• Validation Phase

Section 4— Work stages leading to a Community Standard

Annex: Overview of OAIS Reference Model applicable to this standard

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Overview SchematicOverview Schematic

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Preliminary PhasePreliminary Phase

Summary of the preliminary phaseFirst contact.

Information to be archived.

Digital objects and standards applied to these objects.

Quantification.

Object references.

Security conditions.

Legal and contractual aspects.

Transfer operations.

Preliminary definition,feasibility and assessment

Validation.

Schedule.

Permanent impact on the Archive.

Summary of costs, risks.

Critical points.

Establishment of a preliminary agreement.

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Formal PhaseFormal Phase

Summary of the formal definition phaseSetting up of the organization.

General project contextand definition ofInformation ObjectsCreation of a dictionary

Information to bepreserved and Mode l ofData Objects to bedelivered.

Construction of a formalmodel

Formalization of contractual and legal aspectsDefinition of transfer conditions.Validation definition.Delivery schedule.Change management.

Formal definition

Feasibility and assessment.Submission Agreement.

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Transfer PhaseTransfer Phase

Summary of the Transfer Phase— Carry out the transfer test— Manage the transfer

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Validation PhaseValidation Phase

Summary of the Validation Phase— Carry out the validation test— Manage the validation

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StatusStatus

Track versions of the document from— http://ssdoo.gsfc.nasa.gov/nost/isoas/us/overview.html— Submit comments directly, or through Bruce Ambacher

/NARA

Version out for formal review expected mid-January, 2003— Adding additional material in ‘managing change’