/// <summary>
/// Generates the triples.
/// </summary>
/// <param name="outputGraph">The Rdf graph.</param>
private void GenerateTriples(Graph outputGraph)
{
//If there are no attributes or only the optional rdf:ID attribute i then
//o := literal(literal-value:="", literal-language := e.language) and
//the following statement is added to the graph:
//e.parent.subject.string-value e.URI-string-value o.string-value .
EventAttribute i = innerElement.Attributes.
Where(tuple => tuple.Uri == IDUri).FirstOrDefault();
if (innerElement.Attributes.Count() == 0 ||
(innerElement.Attributes.Count() == 1 && i != null))
{
Subject s = innerElement.Parent.Subject;
RDFUriReference p = innerElement.Uri;
Node o = new PlainLiteral(string.Empty, innerElement.Language);
AddTriple(outputGraph, s, p, o);
//and then if i is given, the above statement is reified with
//uri(identifier := resolve(e, concat("#", i.string-value)))
//using the reification rules
if (i != null)
{
RDFUriReference elementUri = Production.Resolve(innerElement, ("#" + i.StringValue));
Production.Reify(s, p, o, elementUri, outputGraph);
}
}
else
{
Subject r = GetSubject();
//For all propertyAttr attributes a (in any order)
//If a.URI == rdf:type then u:=uri(identifier:=resolve(a.string-value)) and the following triple is added to the graph:
//r.string-value <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> u.string-value .
//Otherwise Unicode string a.string-value SHOULD be in Normal Form C[NFC],
//o := literal(literal-value := a.string-value, literal-language := e.language) and the following statement is added to the graph:
//r.string-value a.URI-string-value o.string-value .
//propertyAttr = anyURI - ( coreSyntaxTerms | rdf:Description | rdf:li | oldTerms )
IEnumerable <EventAttribute> propertyAttr = innerElement.Attributes.
Where(tuple => tuple.Uri != DescriptionUri &&
tuple.Uri != LiUri &&
(Production.CoreSyntaxTerms.Where(attr => attr == tuple.Uri).Count() == 0) &&
(Production.OldTerms.Where(attr => attr == tuple.Uri).Count() == 0));
foreach (EventAttribute a in propertyAttr)
{
if (a.Uri == TypeUri)
{
RDFUriReference u = Production.Resolve(innerElement, a.StringValue);
AddTriple(outputGraph, r, TypeUri, u);
}
//Attributes except rdf:resource and rdf:nodeID
else if (!(a.Uri == ResourceUri || a.Uri == NodeIDUri))
{
Node literal = new PlainLiteral(a.StringValue, innerElement.Language);
AddTriple(outputGraph, r, a.Uri, literal);
}
}
//Add the following statement to the graph:
//e.parent.subject.string-value e.URI-string-value r.string-value .
//and then if rdf:ID attribute i is given, the above statement is reified with uri(identifier := resolve(e, concat("#", i.string-value))) using the reification rules
Subject s = innerElement.Parent.Subject;
RDFUriReference p = innerElement.Uri;
Node o = r;
AddTriple(outputGraph, s, p, o);
if (i != null)
{
RDFUriReference elementUri = Production.Resolve(innerElement, ("#" + i.StringValue));
Production.Reify(s, p, o, elementUri, outputGraph);
}
}
}