in src/main/java/software/amazon/neptune/csv2rdf/UriPostTransformation.java [173:181]
public void registerResource(String subject, String predicate, String object) {
if (predicate.equals(RDF.TYPE.toString()) && object.equals(typeUri)) {
Matcher matcher = srcPattern.matcher(subject);
if (matcher.matches()) {
resources.add(subject); // may override (which does not harm)
}
}
}