diff --git a/nxdl.xsd b/nxdl.xsd
index a82b3217ac..27cd0efbb9 100755
--- a/nxdl.xsd
+++ b/nxdl.xsd
@@ -506,7 +506,7 @@ https://stackoverflow.com/a/48980995/1046449 -->
 				</xs:documentation>
 			</xs:annotation>
 		</xs:attribute>
-		<xs:attribute name="maxOccurs" use="optional" type="nx:nonNegativeUnbounded">
+		<xs:attribute name="maxOccurs" use="optional" type="nx:nonNegativeUnbounded" default="unbounded">
 			<xs:annotation>
 				<xs:documentation>
 					Maximum number of times this ``group`` is allowed to be present within its
@@ -841,7 +841,7 @@ https://stackoverflow.com/a/48980995/1046449 -->
 						</xs:documentation>
 					</xs:annotation>
 				</xs:attribute>
-				<xs:attribute name="maxOccurs" use="optional"  default="1" type="nx:nonNegativeUnbounded">
+				<xs:attribute name="maxOccurs" use="optional" default="1" type="nx:nonNegativeUnbounded">
 					<xs:annotation>
 						<xs:documentation>
 							Defines the maximum number of times this element may be used.  Its