<xsd:attribute name="type">
    <xsd:annotation>
        <xsd:documentation>Specifies the type of data represented by the datatype element.</xsd:documentation>
    </xsd:annotation>
    <xsd:simpleType>
        <xsd:restriction base="xsd:string">
            <xsd:enumeration value="string" />
            <xsd:enumeration value="number" />
            <xsd:enumeration value="int" />
            <xsd:enumeration value="float" />
            <xsd:enumeration value="fixed.14.4" />
            <xsd:enumeration value="boolean" />
            <xsd:enumeration value="dateTime.iso8601" />
            <xsd:enumeration value="dateTime.iso8601tz" />
            <xsd:enumeration value="date.iso8601" />
            <xsd:enumeration value="time.iso8601" />
            <xsd:enumeration value="time.iso8601.tz" />
            <xsd:enumeration value="i1" />
            <xsd:enumeration value="i2" />
            <xsd:enumeration value="i4" />
            <xsd:enumeration value="i8" />
            <xsd:enumeration value="ui1" />
            <xsd:enumeration value="ui2" />
            <xsd:enumeration value="ui4" />
            <xsd:enumeration value="ui8" />
            <xsd:enumeration value="r4" />
            <xsd:enumeration value="r8" />
            <xsd:enumeration value="float.IEEE.754.32" />
            <xsd:enumeration value="float.IEEE.754.64" />
            <xsd:enumeration value="uuid" />
            <xsd:enumeration value="uri" />
            <xsd:enumeration value="bin.hex" />
            <xsd:enumeration value="char" />
            <xsd:enumeration value="string.ansi" />
        </xsd:restriction>
    </xsd:simpleType>
</xsd:attribute>