diff --git a/src/main/java/fr/jmmc/oitools/image/ImageOiConstants.java b/src/main/java/fr/jmmc/oitools/image/ImageOiConstants.java
index 462d012..b84bc8f 100644
--- a/src/main/java/fr/jmmc/oitools/image/ImageOiConstants.java
+++ b/src/main/java/fr/jmmc/oitools/image/ImageOiConstants.java
@@ -30,6 +30,8 @@ public interface ImageOiConstants {
     public final static String EXTNAME_IMAGE_OI_INPUT_PARAM = "IMAGE-OI INPUT PARAM";
     /** IMAGE-OI_OUTPUT_PARAM : extension name for IMAGE-OI parameters  */
     public final static String EXTNAME_IMAGE_OI_OUTPUT_PARAM = "IMAGE-OI OUTPUT PARAM";
+    /** IMAGE-OI_USER_APPRECIATION_PARAM : extension name for IMAGE-OI parameters */
+    public final static String EXTNAME_IMAGE_OI_USER_APPRECIATION_PARAM = "IMAGE-OI USER APPRECIATION PARAM";
 
     // Data Selection keywords
     /** TARGET keyword */
@@ -76,4 +78,10 @@ public interface ImageOiConstants {
     public final static String KEYWORD_NITER = "NITER";
     /** CHISQ keyword */
     public final static String KEYWORD_CHISQ = "CHISQ";
+    
+    // User appreciation keywords
+    /** Rating */
+    public final static String KEYWORD_RATING = "RATING";
+    /** Comments */
+    public final static String KEYWORD_COMMENTS = "COMMENTS";
 }
diff --git a/src/main/java/fr/jmmc/oitools/image/UserAppreciationParam.java b/src/main/java/fr/jmmc/oitools/image/UserAppreciationParam.java
new file mode 100644
index 0000000..3c2352e
--- /dev/null
+++ b/src/main/java/fr/jmmc/oitools/image/UserAppreciationParam.java
@@ -0,0 +1,68 @@
+/* 
+ * Copyright (C) 2018 CNRS - JMMC project ( http://www.jmmc.fr )
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+/*******************************************************************************
+ * JMMC project ( http://www.jmmc.fr ) - Copyright (C) CNRS.
+ ******************************************************************************/
+package fr.jmmc.oitools.image;
+
+import fr.jmmc.oitools.fits.FitsTable;
+import fr.jmmc.oitools.meta.KeywordMeta;
+import fr.jmmc.oitools.meta.Types;
+import java.io.Serializable;
+
+/**
+ *
+ * @author martin
+ */
+public class UserAppreciationParam extends FitsTable implements Serializable {
+
+    // Define User appreciation keywords
+    private final static KeywordMeta KEYWORD_RATING = new KeywordMeta(ImageOiConstants.KEYWORD_RATING, "User rating of the reconstructed image", Types.TYPE_INT);
+    private final static  KeywordMeta KEYWORD_COMMENTS = new KeywordMeta(ImageOiConstants.KEYWORD_COMMENTS, "Optional user comments", Types.TYPE_CHAR);
+    
+    public UserAppreciationParam() {
+        super();
+        
+        // add standard keywords
+        addKeywordMeta(KEYWORD_RATING);
+        addKeywordMeta(KEYWORD_COMMENTS);
+        
+        // Set default values
+        setNbRows(0);
+        setExtVer(1);
+        setExtName(ImageOiConstants.EXTNAME_IMAGE_OI_USER_APPRECIATION_PARAM);
+    }
+    
+    /*
+     * --- Keywords ------------------------------------------------------------ 
+     */
+    public int getRating() {
+        return getKeywordInt(ImageOiConstants.KEYWORD_RATING);
+    }
+    
+    public void setRating(int rating) {
+        setKeywordInt(ImageOiConstants.KEYWORD_RATING, rating);
+    }
+    
+    public String getComments() {
+        return getKeyword(ImageOiConstants.KEYWORD_COMMENTS);
+    }
+    
+    public void setComments(String comments) {
+        setKeyword(ImageOiConstants.KEYWORD_COMMENTS, comments);
+    }
+}