// Call metadata synchronization checking
lve.addAll(new SynchronizedMetaDataValidation()
.validateMetadataSynchronization(document, metadata));
// Call PDF/A Identifier checking
lve.addAll(new PDFAIdentificationValidation()
.validatePDFAIdentifer(metadata));
// Call rdf:about checking
try {
new RDFAboutAttributeConcordanceValidation()