diff --git a/tdrules-store-loader/src/main/java/giis/tdrules/store/loader/gen/DictionaryAttrGen.java b/tdrules-store-loader/src/main/java/giis/tdrules/store/loader/gen/DictionaryAttrGen.java
index 1336b4e..141b7d6 100644
--- a/tdrules-store-loader/src/main/java/giis/tdrules/store/loader/gen/DictionaryAttrGen.java
+++ b/tdrules-store-loader/src/main/java/giis/tdrules/store/loader/gen/DictionaryAttrGen.java
@@ -34,6 +34,8 @@ public class DictionaryContainer {
 		private char padChar = ' ';
 		private int padSize = 0;
 		
+		ConstraintInteger intConstraint = null;
+		
 		public void reset() {
 			lastIndex = -1;
 			lastCycle = 0;
@@ -112,6 +114,17 @@ public DictionaryAttrGen padLeft(char padChar, int padSize) {
 		return this;
 	}
 
+	/**
+	 * Sets an interval to generated values (applicable to numbers),
+	 * even if the schema does not specify min/max
+	 */
+	public DictionaryAttrGen setInterval(int min, int max) {
+		currentConfiguringContainer.intConstraint = new ConstraintInteger();
+		currentConfiguringContainer.intConstraint.add(">=", String.valueOf(min));
+		currentConfiguringContainer.intConstraint.add("<=", String.valueOf(max));
+		return this;
+	}
+
 	// Internal methods to manage the dictionary
 
 	// returns null if no dictionary container found for the coordinates
@@ -163,6 +176,9 @@ public String generateNumber(IConstraint constraints, String entityName, String
 		DictionaryContainer container = getDictionary(entityName, attrName);
 		String value = super.generateNumber(constraints, entityName, attrName);
 		
+		if (container != null && container.intConstraint != null)
+			value = container.intConstraint.apply(value);
+
 		if (container != null)
 			value = container.padValue(value);
 
diff --git a/tdrules-store-loader/src/test/java/test4giis/tdrules/store/loader/TestGenerationSettings.java b/tdrules-store-loader/src/test/java/test4giis/tdrules/store/loader/TestGenerationSettings.java
index 966baf6..9a45f16 100644
--- a/tdrules-store-loader/src/test/java/test4giis/tdrules/store/loader/TestGenerationSettings.java
+++ b/tdrules-store-loader/src/test/java/test4giis/tdrules/store/loader/TestGenerationSettings.java
@@ -6,6 +6,7 @@
 
 import giis.tdrules.store.loader.IAttrGen;
 import giis.tdrules.store.loader.gen.DeterministicAttrGen;
+import giis.tdrules.store.loader.gen.DictionaryAttrGen;
 
 /**
  * How optional settings of the Attribute Generators influence the generated values
@@ -37,5 +38,24 @@ public void testGenerateDatesMinYear() {
 		gen.incrementAttrCount();
 		assertEquals("2054-01-04", gen.generateDate());
 	}
+	
+	// Limits to int values (when the schema does not specify any) must
+	// be set through a dictionary because are attribute specific
+	@Test
+	public void testGenerateNumberInInterval() {
+		IAttrGen gen= new DictionaryAttrGen().with("entity", "attr").setInterval(2, 4);
+		assertEquals("4", gen.generateNumber(null, "entity", "attr")); // first is 1, out of rang, produces 4
+		gen.incrementAttrCount();
+		assertEquals("2", gen.generateNumber(null, "entity", "attr")); //2
+		gen.incrementAttrCount();
+		assertEquals("3", gen.generateNumber(null, "entity", "attr")); //3
+		gen.incrementAttrCount();
+		assertEquals("4", gen.generateNumber(null, "entity", "attr")); //4
+		gen.incrementAttrCount();
+		assertEquals("2", gen.generateNumber(null, "entity", "attr")); //5 out of range, produces 2
+		gen.incrementAttrCount();
+		assertEquals("3", gen.generateNumber(null, "entity", "attr"));
+
+	}
 
 }