What can we do as a stop-gap to leverage the LC marc2bibframe XSLT which does MARCXML to BIBFRAME2 RDF/XML conversion with bib2lod to handle fields that are differently converted according to the bibliotek-o ontology?
This is a Python program to use both the LC marc2bibframe XSLT and bib2lod for appropriate portions of a record.
- MARC split - splits the input MARC record into portions for each converter, some fields are duplicated in both as they are necessary for the minimal record structure
- strip
bflc:portions -- themarc2bibframeXSLT includes a number of LC-specific additions that are not part of the bibliotek-o output desired, these are stripped - URI alignment - reconcile the URIs of the primary
bf:Workandbf:Instanceentities in the output RDF by adjusting those in themarc2bibframeoutput to match those in thebib2lodoutput - graph merge - easy in RDF, simply combine the sets of triples in order to write out a single RDF document for the bibliotek-o corresponding with the original MARC XML record
> python marc2bteko.py -v testdata/darwin_origin.xml
INFO:root:Converting testdata/darwin_origin.xml -> darwin_origin.ttl...
INFO:root:Have 176 triples from BF conversion
INFO:root:Have 41 triples from bib2lod conversion
INFO:root:Writing 213 triples to darwin_origin.ttl
INFO:root:Done.
The vendor directory include a JAR of bib2lod which does MARCXML to bibliotek-o conversion. This relies upon Java 8 (AKA 1.8.x):
> java -version
java version "1.8.0_112"
...
The vendor directory includes LC marc2bibframe XSL which does MARCXML to BIBFRAME RDF/XML conversion. These XSLs can be used with xsltproc which for me reports:
> xsltproc --version
Using libxml 20900, libxslt 10128 and libexslt 817
xsltproc was compiled against libxml 20900, libxslt 10128 and libexslt 817
libxslt 10128 was compiled against libxml 20900
libexslt 817 was compiled against libxml 20900
For RDF format conversion I use rapper (so I never have to see any RDF/XML!):
> rapper --version
2.0.15
> xsltproc vendor/marc2bibframe2-xsl/marc2bibframe2.xsl vendor/bib2lod/102063.min.xml | rapper -o turtle - http://example.org/ > tmp/102063-bf.ttl
rapper: Parsing file <stdin> with parser rdfxml and base URI http://example.org/
rapper: Serializing with serializer turtle and base URI http://example.org/
rapper: Parsing returned 48 triples
> java -jar vendor/bib2lod/bib2lod.jar -c vendor/bib2lod/config.json; rapper -i turtle -o turtle -f xmlns:rdfs=\"http://www.w3.org/2000/01/rdf-schema#\" -f xmlns:bf=\"http://id.loc.gov/ontologies/bibframe/\" -f xmlns:bib=\"http://bibliotek-o.org/ontology/\" -f xmlns:dct=\"http://purl.org/dc/terms/\" -f xmlns:vivo=\"http://vivoweb.org/ontology/core#\" tmp/102063.min.ttl http://example.org/ > tmp/102063-bteko.ttl
15:14:06.093 INFO org.ld4l.bib2lod.managers.SimpleManager line 39 - START CONVERSION.
15:14:06.793 INFO org.ld4l.bib2lod.managers.SimpleManager line 44 - END CONVERSION.
rapper: Parsing URI file:///Users/simeon/src/bteko2bf/tmp/102063.min.ttl with parser turtle and base URI http://example.org/
rapper: Serializing with serializer turtle and base URI http://example.org/
rapper: Parsing returned 31 triples