def gen_core():
"""generate SEED core model, the base import of all SEED node models."""
SEED_LOG.info('creating core model ...')
core = Graph()
# core model base, prefix and namespace
# setup prefix
core.bind("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#")
core.bind("rdfs", "http://www.w3.org/2000/01/rdf-schema#")
core.bind("xsd", "http://www.w3.org/2001/XMLSchema#")
core.bind("owl", "http://www.w3.org/2002/07/owl#")
core.bind("dc", DC_URI)
core.bind("terms", TERMS_URI)
core.bind("seed", SEED_URI)
# setup base URI
core.base = URIRef(SEED_BASE)
# this is an OWL Ontology
core.add((core.base, RDF.type, OWL.Ontology))
core.add((core.base, RDFS.comment, Literal('SEED ontology', lang='EN')))
# Dublin Core Metadata
core.add((core.base, DC.date, Literal('2013-01-31')))
core.add((core.base, DC.creator, Literal('Shi.Zhan')))
core.add((core.base, DC.created,
Literal(time.strftime('%Y-%m-%d %H:%M:%S',
time.localtime(time.time())).encode('utf-8'),
datatype=XSD.dateTimeStamp)
))
core.add((core.base, TERMS.license, Literal(LICENSE, datatype=XSD.string)))
# use program version as model version, recording the origin of model.
core.add((core.base, OWL.versionInfo,
Literal(VERSION, datatype=XSD.hexBinary)))
# setup default datatype
core.add((XSD.anyType, RDF.type, RDFS.Datatype))
# declare classes
core.add((SEED.Object, RDF.type, OWL.Class))
core.add((SEED.Bucket, RDF.type, OWL.Class))
core.add((SEED.Bucket, RDFS.subClassOf, SEED.Object))
core.add((SEED.SimpleObject, RDF.type, OWL.Class))
core.add((SEED.SimpleObject, RDFS.subClassOf, SEED.Object))
core.add((SEED.CompositeObject, RDF.type, OWL.Class))
core.add((SEED.CompositeObject, RDFS.subClassOf, SEED.SimpleObject))
core.add((SEED.Root, RDF.type, OWL.Class))
core.add((SEED.Root, RDFS.subClassOf, SEED.Bucket))
core.add((SEED.Bucket, OWL.disjointWith, SEED.SimpleObject))
# declare and assign properties
core.add((SEED.contain, RDF.type, OWL.ObjectProperty))
core.add((SEED.stripe, RDF.type, OWL.ObjectProperty))
core.add((SEED.replicate, RDF.type, OWL.ObjectProperty))
core.add((SEED.redundancy, RDF.type, OWL.ObjectProperty))
core.add((SEED.name, RDF.type, OWL.DatatypeProperty))
core.add((SEED.origin, RDF.type, OWL.DatatypeProperty))
core.add((SEED.mode, RDF.type, OWL.DatatypeProperty))
core.add((SEED.ctime, RDF.type, OWL.DatatypeProperty))
core.add((SEED.mtime, RDF.type, OWL.DatatypeProperty))
core.add((SEED.atime, RDF.type, OWL.DatatypeProperty))
core.add((SEED.size, RDF.type, OWL.DatatypeProperty))
core.add((SEED.uid, RDF.type, OWL.DatatypeProperty))
core.add((SEED.gid, RDF.type, OWL.DatatypeProperty))
# Bucket contain only Object
set_property(core, (SEED.Bucket, SEED.contain, SEED.Object), only=True)
# CompositeObject [stripe, replicate, redundancy] only SimpleObject
set_property(core,
(SEED.CompositeObject, SEED.stripe, SEED.SimpleObject), only=True)
set_property(core,
(SEED.CompositeObject, SEED.replicate, SEED.SimpleObject), only=True)
set_property(core,
(SEED.CompositeObject, SEED.redundancy, SEED.SimpleObject), only=True)
# Object name
set_property(core,
(SEED.Object, SEED.name, XSD.normalizedString), max_qc=1)
# Object origin
set_property(core,
(SEED.Object, SEED.origin, XSD.normalizedString), max_qc=1)
# Object stat [mode, {c|m|a}time, length, size, uid, gid]
set_property(core, (SEED.Object, SEED.mode, XSD.unsignedShort), max_qc=1)
set_property(core, (SEED.Object, SEED.ctime, XSD.unsignedLong), max_qc=1)
set_property(core, (SEED.Object, SEED.mtime, XSD.unsignedLong), max_qc=1)
set_property(core, (SEED.Object, SEED.atime, XSD.unsignedLong), max_qc=1)
set_property(core, (SEED.Object, SEED.size, XSD.unsignedLong), max_qc=1)
set_property(core, (SEED.Object, SEED.uid, XSD.int), max_qc=1)
set_property(core, (SEED.Object, SEED.gid, XSD.int), max_qc=1)
# Serialize the store as RDF/XML to file.
core.serialize(DEFAULT_CORE_MODEL)
SEED_LOG.info("produced %d triples in %s." % \
(len(core), DEFAULT_CORE_MODEL))
