diff --git a/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/schema/type/KeyValuedColumnType.java b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/schema/type/KeyValuedColumnType.java
new file mode 100644
index 0000000..2419cdd
--- /dev/null
+++ b/ovsdb/rfc/src/main/java/org/onosproject/ovsdb/rfc/schema/type/KeyValuedColumnType.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.ovsdb.rfc.schema.type;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Objects;
+
+/**
+ * a JSON object that describes the type of a database column, with key and
+ * value. Refer to RFC 7047 Section 3.2.
+ */
+public final class KeyValuedColumnType implements ColumnType {
+    private final BaseType keyType;
+    private final BaseType valueType;
+    private final int min;
+    private final int max;
+
+    /**
+     * Constructs a KeyValuedColumnType object.
+     * @param keyType BaseType entity
+     * @param valueType BaseType entity
+     * @param min min constraint
+     * @param max max constraint
+     */
+    public KeyValuedColumnType(BaseType keyType, BaseType valueType, int min,
+                               int max) {
+        checkNotNull(keyType, "keyType is not null");
+        checkNotNull(valueType, "valueType is not null");
+        this.keyType = keyType;
+        this.valueType = valueType;
+        this.min = min;
+        this.max = max;
+    }
+
+    /**
+     * Get keyType.
+     * @return keyType
+     */
+    public BaseType keyType() {
+        return keyType;
+    }
+
+    /**
+     * Get valueType.
+     * @return valueType
+     */
+    public BaseType valueType() {
+        return valueType;
+    }
+
+    /**
+     * Get min.
+     * @return min
+     */
+    public int min() {
+        return min;
+    }
+
+    /**
+     * Get max.
+     * @return max
+     */
+    public int max() {
+        return max;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(keyType, valueType, min, max);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof KeyValuedColumnType) {
+            final KeyValuedColumnType other = (KeyValuedColumnType) obj;
+            return Objects.equals(this.keyType, other.keyType)
+                    && Objects.equals(this.valueType, other.valueType)
+                    && Objects.equals(this.min, other.min)
+                    && Objects.equals(this.max, other.max);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(this).add("keyType", keyType)
+                .add("valueType", valueType).add("min", min).add("max", max)
+                .toString();
+    }
+}