Long Term Sustainment of Digital Information for Science and Engineering: ... on OAIS,
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Slide 1:Engineering Formats and GDFR Governance
Josh Lubell Manufacturing Engineering Laboratory, NIST [email protected] Global Digital Format Registry Governance Workshop Washington, DC November 14-15, 2007
Slide 2:NIST Workshop April 24-25, 2007
“ Long Term Sustainment of Digital Information for Science and Engineering: Putting the Pieces Together” Over 30 participants Implementers of OAIS Government (NARA, Library of Congress, Navy, Govt. Printing Office) Universities Third in a series of workshops NIST (March 2006) Bath, UK (February 2007)
Slide 3:Breakout Issues: Archival Information and Technology
Slide 4:Breakout Issues: Standards and Specific Domains
Slide 5:Overall Workshop Conclusions
Facilities for archiving should be available at the source of information creation Archival systems must deliver the right information for the task at hand to the end user Archival system design is a socio-technical problem Obtained from NIST and Univ. of Bath workshops. Second bullet alludes to the 3RsObtained from NIST and Univ. of Bath workshops. Second bullet alludes to the 3Rs
Slide 6:Archival Challenges Unique to Engineering Design
From Kopena, Shaffer, Regli: “CAD Archives Based on OAIS,” Proceedings of ASME Computers and Information in Engineering Conference, DETC2006-99675, Philadelphia, September 2006 Capturing all aspects of a design project Preserving data generated by software tools Predicting how data will be used over long term Package schemas tailored to CAD preservation needed Standards for representation information helpful, but not a silver bullet
Slide 7:Library of Congress Digital Format Sustainability Factors
See digitalpreservation.gov/formats Disclosure – availability of documentation, validation s/w Adoption - popularity Transparency – analysis possible without specialized tools? Self-documentation – metadata included in digital object? External dependencies – specialized software needed to use objects? Impact of patents Technical protection mechanisms – access restrictions
Slide 8:Sustainability Factors Applied to ISO 10303 (STEP)
Disclosure ? International standard ? Third party documentation ? Validation software Adoption ? CAD vendors ? Other domains Transparency ? ASCII and graphical formats Self-documentation ? Rich model-based representation External dependencies ? None as long as software does import/export Impact of patents ? None Technical protection mechanisms ? None
Slide 9:So What's Next?
Sustainability factors not domain-specific Potential future access scenarios not taken into account We need more metrics for STEP and other engineering digital objects Quality and functionality factors a start Question: How would you measure the quality of an engineering archiving and/or records management strategy?
Slide 10:Access Scenarios: The Three Rs
Reference Preserve information in its original state Example (product data engineering): 3D visualization Reuse Allow for future modification, re-engineering Example: ISO 10303-203:1994 (STEP AP203) Rationale Encode construction history, design intent, tolerancing info, lifecycle management info, etc. Example: STEP AP203 ed.2 ++ Ontologies and/or other representations needed
Slide 11:The 3Rs: STEP
Slide 12:Extended Functional Model
EI = Engineering Informatics DOP = Digital Object Prototype METS = Metadata Encoding Transmission Standard
Slide 13:Future Goals
Formalize 3Rs Define EI sustainability metrics Create EI implementation framework More generic than LOTAR (a specification for long term archival of 3D-CAD and associated product data), but more domain-specific than vanilla OAIS Develop EI archival testbed
Slide 14:GDFR Representation Questions
Should the data model and classification scheme be extended for specific domains? Sustainability extension? Engineering informatics extension?
Slide 15:GDFR Governance Questions
Will public users be able to annotate vetted and/or unvetted entries? Helpful when access requirements and/or designated community change Are there lessons to learn from XML schema experience with XML Schema registries?