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rdfs.ts
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rdfs.ts
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import rdfFactory, { NamedNode, Quad, TermType } from "@ontologies/core";
import rdf from "@ontologies/rdf";
import rdfs from "@ontologies/rdfs";
import { equals, id } from "../factoryHelpers";
import { VocabularyProcessingContext, VocabularyProcessor } from "../types";
/**
* Implements the RDF/RDFS axioms and rules.
* @type {VocabularyProcessor}
*/
export const RDFS = {
axioms: [
rdfFactory.quad(rdf.type, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdfs.domain, rdfs.domain, rdf.Property),
rdfFactory.quad(rdfs.range, rdfs.domain, rdf.Property),
rdfFactory.quad(rdfs.subPropertyOf, rdfs.domain, rdf.Property),
rdfFactory.quad(rdfs.subClassOf, rdfs.domain, rdfs.Class),
rdfFactory.quad(rdf.subject, rdfs.domain, rdf.Statement),
rdfFactory.quad(rdf.predicate, rdfs.domain, rdf.Statement),
rdfFactory.quad(rdf.object, rdfs.domain, rdf.Statement),
rdfFactory.quad(rdfs.member, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdf.first, rdfs.domain, rdf.List),
rdfFactory.quad(rdf.rest, rdfs.domain, rdf.List),
rdfFactory.quad(rdfs.seeAlso, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdfs.isDefinedBy, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdfs.comment, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdfs.label, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdf.value, rdfs.domain, rdfs.Resource),
rdfFactory.quad(rdf.type, rdfs.range, rdfs.Class),
rdfFactory.quad(rdfs.domain, rdfs.range, rdfs.Class),
rdfFactory.quad(rdfs.range, rdfs.range, rdfs.Class),
rdfFactory.quad(rdfs.subPropertyOf, rdfs.range, rdf.Property),
rdfFactory.quad(rdfs.subClassOf, rdfs.range, rdfs.Class),
rdfFactory.quad(rdf.subject, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdf.predicate, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdf.object, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdfs.member, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdf.first, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdf.rest, rdfs.range, rdf.List),
rdfFactory.quad(rdfs.seeAlso, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdfs.isDefinedBy, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdfs.comment, rdfs.range, rdfs.Literal),
rdfFactory.quad(rdfs.label, rdfs.range, rdfs.Literal),
rdfFactory.quad(rdf.value, rdfs.range, rdfs.Resource),
rdfFactory.quad(rdf.Alt, rdfs.subClassOf, rdfs.Container),
rdfFactory.quad(rdf.Bag, rdfs.subClassOf, rdfs.Container),
rdfFactory.quad(rdf.Seq, rdfs.subClassOf, rdfs.Container),
rdfFactory.quad(rdfs.ContainerMembershipProperty, rdfs.subClassOf, rdf.Property),
rdfFactory.quad(rdfs.isDefinedBy, rdfs.subPropertyOf, rdfs.seeAlso),
rdfFactory.quad(rdfs.Datatype, rdfs.subClassOf, rdfs.Class),
rdfFactory.quad(rdfs.Resource, rdf.type, rdfs.Class),
rdfFactory.quad(rdfs.Class, rdf.type, rdfs.Class),
],
processStatement(item: Quad, ctx: VocabularyProcessingContext): Quad[] | null {
const result = [item];
const domainStatements = ctx.store.match(item.predicate, rdfs.domain, null, null);
if (domainStatements.length > 0) {
for (let i = 0; i < domainStatements.length; i++) {
result.push(rdfFactory.quad(item.subject as NamedNode, rdf.type, domainStatements[i].object));
}
}
const rangeStatements = ctx.store.match(item.predicate, rdfs.range, null, null);
if (rangeStatements.length > 0) { // P rdfs:range C..Cn
for (let i = 0; i < rangeStatements.length; i++) {
result.push(rdfFactory.quad(item.object as NamedNode, rdf.type, rangeStatements[i].object));
}
}
if (equals(rdfs.domain, item.predicate)) {
result.push(rdfFactory.quad(item.subject, rdf.type, rdf.Property)); // P rdf:type rdf:Property
result.push(rdfFactory.quad(item.object, rdf.type, rdfs.Class)); // C rdf:type rdfs:Class
const dereferences = ctx.store.match(item.subject, null, null, null);
for (let i = 0; i < dereferences.length; i++) {
result.push(rdfFactory.quad(item.subject as NamedNode, rdf.type, dereferences[i].object));
}
if (!equals(item.subject, rdf.type)) {
ctx.dataStore.getInternalStore().newPropertyAction(
item.subject as NamedNode,
(quad: Quad) => {
ctx.store.addQuads([rdfFactory.quad(quad.subject, rdf.type, item.object)]);
return true;
},
);
}
} else if (equals(rdfs.range, item.predicate)) {
result.push(rdfFactory.quad(item.subject, rdf.type, rdf.Property)); // P rdf:type rdf:Property
result.push(rdfFactory.quad(item.object, rdf.type, rdfs.Class)); // C rdf:type rdfs:Class
const dereferences = ctx.store.match(null, null, item.subject, null);
for (let i = 0; i < dereferences.length; i++) {
result.push(rdfFactory.quad(dereferences[i].subject, rdf.type, item.object));
}
if (!equals(item.subject, rdf.type)) {
ctx.dataStore.getInternalStore().newPropertyAction(
item.subject as NamedNode,
(quad: Quad) => {
ctx.store.addQuads([rdfFactory.quad(quad.object, rdf.type, item.object)]);
return true;
},
);
}
} else if (equals(rdfs.subClassOf, item.predicate)) { // C1 rdfs:subClassOf C2
if (!(item.object.termType === TermType.NamedNode || item.object.termType === TermType.BlankNode)) {
throw new Error("Object of subClassOf statement must be a NamedNode");
}
const iSubject = id(item.subject);
const iObject = id(item.object);
if (!ctx.superMap.has(iObject)) {
ctx.superMap.set(iObject, new Set([id(rdfs.Resource)]));
}
let parents = ctx.superMap.get(iObject);
if (parents === undefined) {
parents = new Set();
ctx.superMap.set(iObject, parents);
}
parents.add(iObject);
const itemVal = ctx.superMap.get(iSubject) || new Set<number>([iSubject]);
parents.forEach((i) => itemVal.add(i));
ctx.superMap.set(iSubject, itemVal);
ctx.superMap.forEach((v, k) => {
if (k !== iSubject && v.has(iSubject)) {
itemVal.forEach(v.add, v);
}
});
} else if (equals(rdfs.subPropertyOf, item.predicate)) {
// TODO: Implement
return result;
}
return result.length === 1 ? null : result;
},
processType(type: NamedNode, ctx: VocabularyProcessingContext): boolean {
RDFS.processStatement(rdfFactory.quad(type, rdfs.subClassOf, rdfs.Resource), ctx);
ctx.store.addQuads([rdfFactory.quad(type, rdf.type, rdfs.Class)]);
return false;
},
} as VocabularyProcessor;