def one_time_rules(self) :
"""
This method is invoked only once at the beginning, and prior of, the forward chaing process.
At present, only the L{subsumption of restricted datatypes<_subsume_restricted_datatypes>} is performed.
"""
RDFS_OWLRL_Semantics.one_time_rules(self)
# it is important to flush the triples at this point, because
# the handling of the restriction datatypes rely on the datatype
# subsumption triples added by the superclass
self.flush_stored_triples()
self._subsume_restricted_datatypes()
def rules(self, t, cycle_num) : """ Go through the additional rules implemented by this module. @param t: a triple (in the form of a tuple) @param cycle_num: which cycle are we in, starting with 1. This value is forwarded to all local rules; it is also used locally to collect the bnodes in the graph. """ RDFS_OWLRL_Semantics.rules(self, t, cycle_num) z, q, x = t if q == hasSelf : for p in self.graph.objects(z, onProperty) : for y in self.graph.subjects( rdfType, z ) : self.store_triple((y, p, y)) for y1, y2 in self.graph.subject_objects(p) : if y1 == y2 : self.store_triple((y1, rdfType, z))
def __init__(self, graph, axioms, daxioms, rdfs = False) : """ @param graph: the RDF graph to be extended @type graph: rdflib.Graph @param axioms: whether (non-datatype) axiomatic triples should be added or not @type axioms: Boolean @param daxioms: whether datatype axiomatic triples should be added or not @type daxioms: Boolean @param rdfs: whether RDFS extension is done @type rdfs: boolean """ RDFS_OWLRL_Semantics.__init__(self, graph, axioms, daxioms, rdfs ) self.rdfs = rdfs self.add_new_datatype(ns_owl["rational"], _strToRational, OWL_RL_Datatypes, subsumption_dict = OWL_Datatype_Subsumptions, subsumption_key = ns_xsd["decimal"], subsumption_list = [ns_owl["rational"]]) self.restricted_datatypes = extract_faceted_datatypes(self, graph) for dt in self.restricted_datatypes : self.add_new_datatype(dt.datatype, dt.toPython, OWL_RL_Datatypes, subsumption_dict = OWL_Datatype_Subsumptions, subsumption_key = dt.datatype, subsumption_list = [ dt.base_type ])
def add_axioms(self) :
"""
Add the L{extra axioms<OWLRL_Extension.extra_axioms>}, related to the self restrictions.
"""
RDFS_OWLRL_Semantics.add_axioms(self)
for t in self.extra_axioms : self.graph.add(t)
