http://www.w3.org/TR/xmlschema11-2/#element-fractionDigits
<xs:element name="fractionDigits" type="xs:numFacet" id="fractionDigits" substitutionGroup="xs:facet"> <xs:annotation> <xs:documentation source="http://www.w3.org/TR/xmlschema11-2/#element-fractionDigits"/> </xs:annotation> </xs:element>