InputStream stream = connection.getInputStream();
Metadata metadata = JpegMetadataReader.readMetadata(stream);
TreeWriter tree = new TreeWriter(runtime);
tree.startDocument(step.getNode().getBaseURI());
tree.addStartElement(c_metadata);
tree.addAttribute(_href, href.toASCIIString());
tree.startContent();
// iterate through metadata directories
Iterator<Directory> directories = metadata.getDirectories().iterator();