// E.g. RDFS rules can create assertions about literals
// that we can't record in RDF
if (isAdd) {
if ( ! context.contains(t) ) {
engine.addTriple(t, true);
if (infGraph.shouldLogDerivations()) {
infGraph.logDerivation(t, new RuleDerivation(rule, t, matchList, infGraph));
}
}
} else {
if ( context.contains(t)) {