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Lossless MARC Mapping
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Lossless MARC Mapping ALA Midwinter Seattle 2013 MARC Formats Transition IG
Diane Hillmann
Is MARC Dead?
• The communication format is very dead (based on standards no longer updated)
• The semantics are not dead o They represent the distillation of decades of
descriptive experience o As we move into a more machine-assisted world, our
old concerns about the size of our legacy can be addressed
o Taking the legacy records with us should be based on solutions developed using open and transparent strategies
‘Lossy’ vs. ‘Lossless’ MARC Mapping
• ‘Lossy’ means that some information gets lost in transition o Loss can also occur intentionally, e.g. when pre-
selection of preferred elements is made
• Current mapping strategies are based on o One-time, inflexible, programmatic methods that
effectively hide the process from consumers § This practice makes it difficult for community
members to effectively respond to decisions made behind the curtain or to contribute to better maps
A Better Strategy
• The decision to set up the MARC21rdf data was to provide the possibility of transparent mapping by data providers at many levels
• This strategy is based on mapping all of MARC – not a selection o Filtering accomplished by data consumers, who know
best what they need o Meeting the potential for widespread use of data
mapped from MARC depends on putting data out without assuming we know what other people need
Libraries as Data Publishers
• Data from library ‘publishers’ should look like an American supermarket—lots of choices, with decisions made by consumers o Right now we seem to be operating as Soviet
bakeries (“we don’t care what you want, we know what you need”) § This stifles innovation and continues to treat
libraries as passive consumers § This is not what open linked data is supposed to
be doing for us
A Resource, WorldCat http://www.worldcat.org/title/linked-data-evolving-the-web-into-a-global-data-space/oclc/704257552
A Resource, MARC21 https://catalog.library.cornell.edu/
marc21rdf.info http://marc21rdf.info/elements/2XX/M260__a
marc21rdf.info http://marc21rdf.info/elements/2XX/M260__a
Definition: Place of publication and any additions to the name of a place, including an address...
tag: 260 (Publication, Distribution, etc. (Imprint) ) ind1: # (Not applicable or No information provided or Earliest available publisher) ind2: # (no caption) sub: a (Place of publication, distribution, etc.)
Search for Place of Publication (1) http://metadataregistry.org/schemaprop/search?sq=Place+of+Publication&commit=Search+Element+Sets
Search for Place of Publication (2) http://metadataregistry.org/schemaprop/search?sq=Place+of+Publication&commit=Search+Element+Sets
RDA Place of Publication (Manifestation) http://rdvocab.info/Elements/placeOfPublicationManifestation
RDA Place of Publication http://rdvocab.info/Elements/placeOfPublication
FRBRer Place of Publication http://iflastandards.info/ns/fr/frbr/frbrer/P3057
ISBD has Place of Publication... http://iflastandards.info/ns/isbd/elements/P1016
How Does this Strategy Fit?
• Mapping as a service o Maps continually updated o Openly available o Easily distributable
• Publishing & Consuming systems o Need to work in tandem to enhance and improve data o The methods to do this are not new, but are not well
understood in traditional libraries (to some extent because of their continuing emphasis on ‘records’)
M21 Level 0
RDF map of “audience” attribute
ex:Resource - m21:M008MU22 - m21t:commonaud#j
My Resource (has) Target audience of Music “juvenile”
My Work (has) Intended audience “juvenile”
My Resource (has) Target audience “juvenile”
RDA
Level 0
MARC 21
My Creative work (has) audience “juvenile” Schema.org
My Resource (has) audience “juvenile” Dublin Core
ISBD My Resource has note on use or audience “juvenile”
M 21 triple
Let the machine to do the work
The Place of Publication http://goo.gl/maps/FaHJ
Questions?
Diane Hillmann [email protected] Metadata Management Associates http://managemetadata.com