Parse successful
<?xml version="1.0" encoding="ISO-8859-1"?>
<Dataset xmlns="http://xml.opendap.org/ns/DAP/4.0#" dapVersion="4.0" dmrVersion="1.0" name="test_simple_3">
    <Enumeration name="e1" basetype="UInt8">
        <EnumConst name="econst1" value="1"/>
        <EnumConst name="econst2" value="2"/>
    </Enumeration>
    <Int32 name="x"/>
</Dataset>

<?xml version="1.0" encoding="ISO-8859-1"?>
<Dataset xmlns="http://xml.opendap.org/ns/DAP/4.0#" dapVersion="4.0" dmrVersion="1.0" name="test_simple_3">
    <Enumeration name="e1" basetype="UInt8">
        <EnumConst name="econst1" value="1"/>
        <EnumConst name="econst2" value="2"/>
    </Enumeration>
    <Int32 name="x">
        <Attribute name="DAP4_Checksum_CRC32" type="String">
            <Value>18df6c9e</Value>
        </Attribute>
    </Int32>
</Dataset>

The data:
{ 123456789 }