// Create root node
IIOMetadataNode root = new IIOMetadataNode(IIOMetadataFormatImpl.standardMetadataFormatName);
Node node;
if ((node = getStandardChromaNode()) != null) {
root.appendChild(node);
}
if ((node = getStandardCompressionNode()) != null) {
root.appendChild(node);
}
if ((node = getStandardDataNode()) != null) {