An Item can contain attachments.
When writing the model into Integrity, an AttachmentResolver is used to retrieve the physical location
of files to be inserted in Integrity:
import com.sodius.mdw.metamodel.integrity.io.ExtractAttachmentCommand;
...
File myFolder = new File(<folder containing OLE object files>);
AttachmentResolver resolver = <provide your own implementation>;
Map<String, Object> options = new HashMap<String, Object>();
options.put("integrity.attachmentResolver", resolver);
myIntegrityModel.write("Application", null, options);