// no built-in obo tag for this: use the generic property_value tag
Clause clause = new Clause(OboFormatTag.TAG_PROPERTY_VALUE.getTag());
String propId = getIdentifier(prop);
addQualifiers(clause, qualifiers);
if (!propId.equals("shorthand")) {
clause.addValue(propId);
if (annVal instanceof OWLLiteral) {
OWLLiteral owlLiteral = (OWLLiteral) annVal;
clause.addValue(owlLiteral.getLiteral());
OWLDatatype datatype = owlLiteral.getDatatype();
IRI dataTypeIri = datatype.getIRI();