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rdf_utils.py
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rdf_utils.py
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import rdflib
from rdflib import Literal, Namespace, RDF, URIRef, XSD
from django.conf import settings
SKOS = Namespace("http://www.w3.org/2004/02/skos/core#")
DC = Namespace("http://purl.org/dc/elements/1.1/")
DCT = Namespace("http://purl.org/dc/terms/")
RDFS = Namespace("http://www.w3.org/2000/01/rdf-schema#")
OWL = Namespace("http://www.w3.org/2002/07/owl#")
VOCABS = Namespace("https://vocabs.acdh.oeaw.ac.at/create-concept-scheme/")
VOCABS_SEPARATOR = getattr(settings, 'VOCABS_SEPARATOR', '/')
RDF_FORMATS = {
"xml": "rdf",
"n3": "n3",
"turtle": "ttl",
"nt": "nt",
"pretty-xml": "rdf",
"trix": "trix",
"trig": "trig",
"nquads": "nq",
"json-ld": ".jsonld",
}
def graph_construct_qs(results):
g = rdflib.Graph()
g.bind('skos', SKOS)
g.bind('dc', DC)
g.bind('dct', DCT)
g.bind('rdfs', RDFS)
g.bind('owl', OWL)
for obj in results:
# Creating Main Concept Scheme
if obj.scheme:
if obj.scheme.legacy_id:
main_concept_scheme = URIRef(obj.scheme.legacy_id)
else:
main_concept_scheme = URIRef(obj.scheme.identifier)
g.add((main_concept_scheme, RDF.type, SKOS.ConceptScheme))
# Concept Scheme properties
if obj.scheme.title:
g.add((main_concept_scheme, DC.title, Literal(obj.scheme.title, lang=obj.scheme.title_lang)))
g.add((main_concept_scheme, RDFS.label, Literal(obj.scheme.title, lang=obj.scheme.title_lang)))
if obj.scheme.has_titles.all():
for title in obj.scheme.has_titles.all():
g.add((main_concept_scheme, DC.title, Literal(title.name, lang=title.language)))
if obj.scheme.has_descriptions.all():
for desc in obj.scheme.has_descriptions.all():
g.add((main_concept_scheme, DC.description, Literal(desc.name, lang=desc.language)))
if obj.scheme.has_sources.all():
for source in obj.scheme.has_sources.all():
g.add((main_concept_scheme, DC.source, Literal(source.name, lang=source.language)))
# accessing lists with ; in TextField
if obj.scheme.creator:
for i in obj.scheme.creator.split(';'):
g.add((main_concept_scheme, DC.creator, Literal(i.strip())))
if obj.scheme.contributor:
for i in obj.scheme.contributor.split(';'):
g.add((main_concept_scheme, DC.contributor, Literal(i.strip())))
if obj.scheme.language:
for i in obj.scheme.language.split(';'):
g.add((main_concept_scheme, DC.language, Literal(i.strip())))
if obj.scheme.subject:
for i in obj.scheme.subject.split(';'):
g.add((main_concept_scheme, DC.subject, Literal(i.strip())))
if obj.scheme.coverage:
for i in obj.scheme.coverage.split(';'):
g.add((main_concept_scheme, DC.coverage, Literal(i.strip())))
# the rest of the properties
if obj.scheme.license:
g.add((main_concept_scheme, DCT.license, Literal(obj.scheme.license)))
if obj.scheme.version:
g.add((main_concept_scheme, OWL.versionInfo, Literal(obj.scheme.version)))
if obj.scheme.publisher:
g.add((main_concept_scheme, DC.publisher, Literal(obj.scheme.publisher)))
if obj.scheme.relation:
g.add((main_concept_scheme, DC.relation, URIRef(obj.scheme.relation)))
if obj.scheme.owner:
g.add((main_concept_scheme, DCT.rightsHolder, Literal(obj.scheme.owner)))
g.add((main_concept_scheme, DCT.created, Literal(obj.scheme.date_created, datatype=XSD.dateTime)))
g.add((main_concept_scheme, DCT.modified, Literal(obj.scheme.date_modified, datatype=XSD.dateTime)))
if obj.scheme.date_issued:
g.add((main_concept_scheme, DCT.issued, Literal(obj.scheme.date_issued, datatype=XSD.dateTime)))
else:
pass
else:
main_concept_scheme = URIRef(VOCABS)
g.add((main_concept_scheme, RDF.type, SKOS.ConceptScheme))
# Concept properties
# TODO user entered URI
# if obj.legacy_id:
# concept = URIRef(obj.legacy_id)
# else:
# concept = URIRef(main_concept_scheme + VOCABS_SEPARATOR + "concept" + str(obj.id))
concept = URIRef(obj.create_uri())
g.add((concept, RDF.type, SKOS.Concept))
g.add((concept, SKOS.prefLabel, Literal(obj.pref_label, lang=obj.pref_label_lang)))
if obj.notation != "":
g.add((concept, SKOS.notation, Literal(obj.notation)))
# each concept must have skos:inScheme main_concept_scheme
g.add((concept, SKOS.inScheme, main_concept_scheme))
if obj.collection.all():
for x in obj.collection.all():
collection = URIRef(x.create_uri())
g.add((collection, RDF.type, SKOS.Collection))
g.add((collection, DCT.created, Literal(x.date_created, datatype=XSD.dateTime)))
g.add((collection, DCT.modified, Literal(x.date_modified, datatype=XSD.dateTime)))
if x.name:
g.add((collection, SKOS.prefLabel, Literal(x.name, lang=x.label_lang)))
# Collection labels
if x.has_labels.all():
for label in x.has_labels.all():
if label.label_type == 'prefLabel':
g.add((collection, SKOS.prefLabel, Literal(label.name, lang=label.language)))
elif label.label_type == 'altLabel':
g.add((collection, SKOS.altLabel, Literal(label.name, lang=label.language)))
elif label.label_type == 'hiddenLabel':
g.add((collection, SKOS.hiddenLabel, Literal(label.name, lang=label.language)))
else:
g.add((collection, SKOS.altLabel, Literal(label.name, lang=label.language)))
# Collection notes
if x.has_notes.all():
for note in x.has_notes.all():
if note.note_type == 'note':
g.add((collection, SKOS.note, Literal(note.name, lang=note.language)))
elif note.note_type == 'scopeNote':
g.add((collection, SKOS.scopeNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'changeNote':
g.add((collection, SKOS.changeNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'editorialNote':
g.add((collection, SKOS.editorialNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'historyNote':
g.add((collection, SKOS.historyNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'definition':
g.add((collection, SKOS.definition, Literal(note.name, lang=note.language)))
elif note.note_type == 'example':
g.add((collection, SKOS.example, Literal(note.name, lang=note.language)))
else:
g.add((collection, SKOS.note, Literal(note.name, lang=note.language)))
# Collection sources
if x.has_sources.all():
for source in x.has_sources.all():
g.add((collection, DC.source, Literal(source.name, lang=source.language)))
if x.creator:
for i in x.creator.split(';'):
g.add((collection, DC.creator, Literal(i.strip())))
if x.contributor:
for i in x.contributor.split(';'):
g.add((collection, DC.contributor, Literal(i.strip())))
if x.has_members.all():
for y in x.has_members.all():
if y.legacy_id:
g.add((collection, SKOS.member, URIRef(y.legacy_id)))
else:
g.add(
(
collection,
SKOS.member,
URIRef(y.create_uri())
)
)
# Concept properties
if obj.has_labels.all():
for label in obj.has_labels.all():
if label.label_type == 'prefLabel':
g.add((concept, SKOS.prefLabel, Literal(label.name, lang=label.language)))
elif label.label_type == 'altLabel':
g.add((concept, SKOS.altLabel, Literal(label.name, lang=label.language)))
elif label.label_type == 'hiddenLabel':
g.add((concept, SKOS.hiddenLabel, Literal(label.name, lang=label.language)))
# if label.label_type is not set then make it altLabel
else:
g.add((concept, SKOS.altLabel, Literal(label.name, lang=label.language)))
if obj.has_notes.all():
for note in obj.has_notes.all():
if note.note_type == 'note':
g.add((concept, SKOS.note, Literal(note.name, lang=note.language)))
elif note.note_type == 'scopeNote':
g.add((concept, SKOS.scopeNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'changeNote':
g.add((concept, SKOS.changeNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'editorialNote':
g.add((concept, SKOS.editorialNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'historyNote':
g.add((concept, SKOS.historyNote, Literal(note.name, lang=note.language)))
elif note.note_type == 'definition':
g.add((concept, SKOS.definition, Literal(note.name, lang=note.language)))
elif note.note_type == 'example':
g.add((concept, SKOS.example, Literal(note.name, lang=note.language)))
else:
g.add((concept, SKOS.note, Literal(note.name, lang=note.language)))
if obj.has_sources.all():
for source in obj.has_sources.all():
g.add((concept, DC.source, Literal(source.name, lang=source.language)))
# top concepts
if not obj.broader_concept:
g.add((main_concept_scheme, SKOS.hasTopConcept, URIRef(concept)))
g.add((concept, SKOS.topConceptOf, main_concept_scheme))
# modelling broader/narrower relationships
if obj.broader_concept:
g.add((concept, SKOS.broader, URIRef(obj.broader_concept.create_uri())))
if obj.narrower_concepts.all():
for x in obj.narrower_concepts.all():
g.add((concept, SKOS.narrower, URIRef(x.create_uri())))
# modelling external matches
# skos:related
if obj.related:
for x in obj.related_as_list():
g.add((concept, SKOS.related, URIRef(x)))
# skos:broadMatch
if obj.broad_match:
for x in obj.broad_match_as_list():
g.add((concept, SKOS.broadMatch, URIRef(x)))
# skos:narrowMatch
if obj.narrow_match:
for x in obj.narrow_match_as_list():
g.add((concept, SKOS.narrowMatch, URIRef(x)))
# skos:exactMatch
if obj.exact_match:
for x in obj.exact_match_as_list():
g.add((concept, SKOS.exactMatch, URIRef(x)))
# skos:relatedMatch
if obj.related_match:
for x in obj.related_match_as_list():
g.add((concept, SKOS.relatedMatch, URIRef(x)))
# skos:closeMatch
if obj.close_match:
for x in obj.close_match_as_list():
g.add((concept, SKOS.closeMatch, URIRef(x)))
# meta
if obj.creator:
for i in obj.creator.split(';'):
g.add((concept, DC.creator, Literal(i.strip())))
if obj.contributor:
for i in obj.contributor.split(';'):
g.add((concept, DC.contributor, Literal(i.strip())))
if obj.date_created:
g.add((concept, DCT.created, Literal(obj.date_created, datatype=XSD.dateTime)))
if obj.date_modified:
g.add((concept, DCT.modified, Literal(obj.date_modified, datatype=XSD.dateTime)))
return g