throw new XmpParsingException(ErrorType.InvalidPrefix,
"Found invalid prefix for PDF/A extension, found '" + xmpSchema.getPrefix()
+ "', should be '" + stPdfaExt.preferedPrefix() + "'");
}
// create schema and types
PDFAExtensionSchema pes = (PDFAExtensionSchema) xmpSchema;
ArrayProperty sp = pes.getSchemasProperty();
for (AbstractField af : sp.getAllProperties())
{
if (af instanceof PDFASchemaType)
{
PDFASchemaType st = (PDFASchemaType) af;