diff --git a/dspace/modules/server/src/main/java/org/dspace/app/rest/submit/UploadableStep.java b/dspace/modules/server/src/main/java/org/dspace/app/rest/submit/UploadableStep.java
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+++ b/dspace/modules/server/src/main/java/org/dspace/app/rest/submit/UploadableStep.java
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+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+package org.dspace.app.rest.submit;
+
+import java.io.IOException;
+
+import org.dspace.app.rest.model.ErrorRest;
+import org.dspace.app.util.SubmissionStepConfig;
+import org.dspace.content.InProgressSubmission;
+import org.dspace.core.Context;
+import org.springframework.web.multipart.MultipartFile;
+
+/**
+ * The interface for submission Steps that need to deal with file upload
+ * 
+ * @author Luigi Andrea Pascarelli (luigiandrea.pascarelli at 4science.it)
+ * @author Andrea Bollini (andrea.bollini at 4science.it)
+ */
+public interface UploadableStep extends RestProcessingStep {
+
+    /**
+     * The method to implement to support upload of a file in the submission section (aka panel / step)
+     * 
+     * @param context
+     *            the dspace context
+     * @param submissionService
+     *            the submission service
+     * @param stepConfig
+     *            the configuration of the submission section
+     * @param wsi
+     *            the inprogress submission
+     * @param file
+     *            the multipart file, please note that it is a complex object containing additional information other
+     *            than just the binary such as the filename and the mimetype
+     * @return the encountered error if any
+     * @throws IOException
+     */
+    public ErrorRest upload(Context context, SubmissionService submissionService, SubmissionStepConfig stepConfig,
+                            InProgressSubmission wsi, MultipartFile file) throws IOException;
+
+}