diff --git a/daffodil-propgen/src/main/resources/org/apache/daffodil/xsd/dafext.xsd b/daffodil-propgen/src/main/resources/org/apache/daffodil/xsd/dafext.xsd
index 3d89c56617..fffa275bb6 100644
--- a/daffodil-propgen/src/main/resources/org/apache/daffodil/xsd/dafext.xsd
+++ b/daffodil-propgen/src/main/resources/org/apache/daffodil/xsd/dafext.xsd
@@ -185,6 +185,13 @@
             </xs:documentation>
           </xs:annotation>
         </xs:element>
+        <xs:element name="escalateWarningsToErrors" type="xs:boolean" default="false" minOccurs="0">
+          <xs:annotation>
+            <xs:documentation>
+              This tunable allows the escalation of Schema Definition Warnings to Errors.
+            </xs:documentation>
+          </xs:annotation>
+        </xs:element>
         <xs:element name="generatedNamespacePrefixStem" type="xs:string" default="tns" minOccurs="0">
           <xs:annotation>
             <xs:documentation>
diff --git a/daffodil-runtime1/src/main/scala/org/apache/daffodil/runtime1/dsom/SDE.scala b/daffodil-runtime1/src/main/scala/org/apache/daffodil/runtime1/dsom/SDE.scala
index 0108e5f8af..e160286416 100644
--- a/daffodil-runtime1/src/main/scala/org/apache/daffodil/runtime1/dsom/SDE.scala
+++ b/daffodil-runtime1/src/main/scala/org/apache/daffodil/runtime1/dsom/SDE.scala
@@ -262,14 +262,26 @@ trait ImplementsThrowsOrSavesSDE extends ImplementsThrowsSDE with SavesErrorsAnd
     val suppress = lssdw.contains(warnID) || lssdw.contains(WarnID.All) ||
       tssdw.contains(warnID) || tssdw.contains(WarnID.All)
     if (!suppress) {
-      val sdw = new SchemaDefinitionWarning(
-        warnID,
-        Some(schemaFileLocation),
-        NoAnnotationContext,
-        fmt,
-        args: _*
-      )
-      warn(sdw)
+      if (tunable.escalateWarningsToErrors) {
+        val msg = "warnings escalated to errors: " + fmt
+        val sde = new SchemaDefinitionError(
+          Some(schemaFileLocation),
+          NoAnnotationContext,
+          msg,
+          args: _*
+        )
+        error(sde)
+      } else {
+
+        val sdw = new SchemaDefinitionWarning(
+          warnID,
+          Some(schemaFileLocation),
+          NoAnnotationContext,
+          fmt,
+          args: _*
+        )
+        warn(sdw)
+      }
     }
   }
 
diff --git a/daffodil-test/src/test/resources/org/apache/daffodil/section02/schema_definition_errors/SchemaDefinitionErrors.tdml b/daffodil-test/src/test/resources/org/apache/daffodil/section02/schema_definition_errors/SchemaDefinitionErrors.tdml
index f8c0fedb1e..14b0fd011e 100644
--- a/daffodil-test/src/test/resources/org/apache/daffodil/section02/schema_definition_errors/SchemaDefinitionErrors.tdml
+++ b/daffodil-test/src/test/resources/org/apache/daffodil/section02/schema_definition_errors/SchemaDefinitionErrors.tdml
@@ -308,4 +308,41 @@
     </tdml:infoset>
   </tdml:parserTestCase>
 
+
+  <tdml:defineSchema name="warning_escalated">
+    <xs:include schemaLocation="/org/apache/daffodil/xsd/DFDLGeneralFormat.dfdl.xsd"/>
+    <dfdl:format ref="ex:GeneralFormat" lengthKind="delimited" encoding="utf-8" representation="text"/>
+    <xs:element name="elem" type="xs:string">
+      <xs:annotation>
+        <xs:appinfo source="http://www.ogf.org/dfdl/dfdl-1.0/" />
+      </xs:annotation>
+    </xs:element>
+  </tdml:defineSchema>
+
+
+  <tdml:defineConfig name="escalateWarnings">
+    <daf:tunables>
+      <daf:escalateWarningsToErrors>true</daf:escalateWarningsToErrors>
+    </daf:tunables>
+  </tdml:defineConfig>
+
+  <!--
+      Test Name: schema_warning_escalated_to_error
+         Schema: warning_escalated
+           Root: elem
+        Purpose: This test demonstrates escalating warnings to errors
+  -->
+
+  <tdml:parserTestCase name="schema_warning_escalated_to_error" root="elem"
+                       model="warning_escalated"
+                       ignoreUnexpectedWarnings="false"
+                       config="escalateWarnings">
+    <tdml:document><![CDATA[test]]></tdml:document>
+    <tdml:errors>
+      <tdml:error>Schema Definition Error</tdml:error>
+      <tdml:error>warnings escalated to errors</tdml:error>
+      <tdml:error>xs:appinfo source attribute</tdml:error>
+    </tdml:errors>
+  </tdml:parserTestCase>
+
 </tdml:testSuite>
diff --git a/daffodil-test/src/test/scala/org/apache/daffodil/section02/schema_definition_errors/TestSDE.scala b/daffodil-test/src/test/scala/org/apache/daffodil/section02/schema_definition_errors/TestSDE.scala
index e215b43a2b..03258887a7 100644
--- a/daffodil-test/src/test/scala/org/apache/daffodil/section02/schema_definition_errors/TestSDE.scala
+++ b/daffodil-test/src/test/scala/org/apache/daffodil/section02/schema_definition_errors/TestSDE.scala
@@ -57,4 +57,8 @@ class TestSDE {
   @Test def test_schema_warning_locally_suppressed(): Unit = {
     runner.runOneTest("schema_warning_locally_suppressed")
   }
+
+  @Test def test_schema_warning_escalated_to_error(): Unit = {
+    runner.runOneTest("schema_warning_escalated_to_error")
+  }
 }