if (config.getBoolean(Keys.ASCIIDOCTOR_ATTRIBUTES_EXPORT, false)) {
final String prefix = config.getString( Keys.ASCIIDOCTOR_ATTRIBUTES_EXPORT_PREFIX, "");
for (final Iterator<String> it = config.getKeys(); it.hasNext();) {
final String key = it.next();
if (!key.startsWith("asciidoctor")) {
attributes.attribute(prefix + key.replace(".", "_"), config.getProperty(key));
}
}
}
final Configuration optionsSubset = config.subset(Keys.ASCIIDOCTOR_OPTION);
final Options options = options().attributes(attributes.get()).get();