diff --git a/fermenter-mda/src/main/java/org/technologybrewery/fermenter/mda/metamodel/element/NamespacedMetamodelElement.java b/fermenter-mda/src/main/java/org/technologybrewery/fermenter/mda/metamodel/element/NamespacedMetamodelElement.java
index 5f4b009d..0e9ab8bd 100644
--- a/fermenter-mda/src/main/java/org/technologybrewery/fermenter/mda/metamodel/element/NamespacedMetamodelElement.java
+++ b/fermenter-mda/src/main/java/org/technologybrewery/fermenter/mda/metamodel/element/NamespacedMetamodelElement.java
@@ -2,6 +2,7 @@
 
 import java.util.Objects;
 
+import org.apache.commons.lang3.StringUtils;
 import org.technologybrewery.fermenter.mda.element.ValidatedElement;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
@@ -81,4 +82,12 @@ public String toString() {
 		return MoreObjects.toStringHelper(this).add(PACKAGE, getPackage()).add(NAME, name).toString();
 	}
 
+    @Override
+    public void validate() {
+        super.validate();
+        if (StringUtils.isBlank(getPackage())) {
+            messageTracker.addErrorMessage("Package is a required attribute!");
+        }
+    }
+
 }