@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
-<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="qualified" version="1.3; August 21, 2019">
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" attributeFormDefault="unqualified" elementFormDefault="qualified" version="1.2; August 5, 2019">
   <xs:element name="ClinVarVariationRelease" type="ReleaseType">
     <xs:annotation>
       <xs:documentation>The element to group each VariationArchive element in the release</xs:documentation>
@@ -513,7 +513,7 @@
           <xs:attribute name="display_start" type="xs:nonNegativeInteger" use="optional"/>
           <xs:attribute name="display_stop" type="xs:positiveInteger" use="optional"/>
           <xs:attribute name="Strand" type="xs:string" use="optional"/>
-          <xs:attribute name="variantLength" type="xs:nonNegativeInteger" use="optional"/>
+          <xs:attribute name="variantLength" type="xs:positiveInteger" use="optional"/>
           <xs:attribute name="referenceAllele" type="xs:string" use="optional"/>
           <xs:attribute name="alternateAllele" type="xs:string" use="optional"/>
           <xs:attribute name="AssemblyAccessionVersion" type="xs:string" use="optional"/>