Considerable effort during the first year of the grant was spent architecting a MARC converter as a robust, well-tested, community-extensible tool for converting traditional cataloging formats to RDF and linked data. A multi-phase strategy for “deduping” of local URIs was designed to ensure that during bulk conversion only one local URI would be minted for each unique entity. Given the decision of many LD4L Labs and LD4P projects to use the bibliotek-o extension ontology rather than pure BIBFRAME 2.0, the converter was written to target BIBFRAME with the bibliotek-o extension ontology. The initial milestone for the converter, demonstrated in April 2017, was to generate bibliotek-o RDF for the “minimum viable MARC record,” consisting of the smallest number of fields constituting a valid MARC record. The initial framework was extended by the Harvard team to create two specialized converters in order to convert Harvard Film Archive XML records (hfa2lod) and Federal Geographic Data Committee (FGDC) records (fgdc2lod) to Linked Open Data. This extension work is described in FGDC & HFA to BIBFRAME Conversion.
Converter framework code: https://github.com/ld4l-labs/bib2lod
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