lve.addAll(new PDFAIdentificationValidation()
.validatePDFAIdentifer(metadata));
// Call rdf:about checking
try {
new RDFAboutAttributeConcordanceValidation()
.validateRDFAboutAttributes(metadata);
} catch (DifferentRDFAboutException e) {
lve.add(new ValidationError(
ValidationConstants.ERROR_METADATA_RDF_ABOUT_ATTRIBUTE_INEQUAL_VALUE, e
.getMessage()));