Test Meta properties from TinkerPop

[BruJu]

PREC/src/prec/graph-builder.ts

Lines 392 to 409 in 4ec835c

	if (propertyObject.meta !== undefined) {
	let metaNode = DataFactory.blankNode();
	this._addQuad(o, prec.hasMetaProperties, metaNode);
	for (let metaKey in propertyObject.meta) {
	let metaValue = propertyObject.meta[metaKey];
	let propertyNode = propMaker[metaKey + tag];
	this._labelize(propertyNode, metaKey);
	this._addQuad(propertyNode, rdf.type, prec.PropertyKey);
	this._addQuad(propertyNode, rdf.type, prec.CreatedPropertyKey);
	this._addQuad(prec.CreatedPropertyKey, rdfs.subClassOf, prec.CreatedVocabulary);
	let target = buildPropertyValue(metaValue);
	this._addQuad(metaNode, propertyNode, target);
	}
	}

This snippet is never tested in a standard npm run test run, and probably buggy.