Parse successful
<?xml version="1.0" encoding="ISO-8859-1"?>
<Dataset xmlns="http://xml.opendap.org/ns/DAP/4.0#" xml:base="file:dap4/test_array_6.xml" dapVersion="4.0" dmrVersion="1.0" name="test_array_6">
    <Dimension name="row" size="3"/>
    <Dimension name="col" size="4"/>
    <Structure name="a">
        <Int32 name="i">
            <Dim name="/row"/>
            <Dim size="6"/>
        </Int32>
        <Int32 name="j"/>
        <Dim name="/row"/>
        <Dim name="/col"/>
    </Structure>
</Dataset>

<?xml version="1.0" encoding="ISO-8859-1"?>
<Dataset xmlns="http://xml.opendap.org/ns/DAP/4.0#" xml:base="file:dap4/test_array_6.xml" dapVersion="4.0" dmrVersion="1.0" name="test_array_6">
    <Dimension name="row" size="1"/>
    <Structure name="a">
        <Int32 name="i">
            <Dim name="/row"/>
            <Dim size="2"/>
        </Int32>
        <Dim name="/row"/>
        <Dim size="1"/>
        <Attribute name="DAP4_Checksum_CRC32" type="String">
            <Value>a5f4caa5</Value>
        </Attribute>
    </Structure>
</Dataset>

The data:
{ {{{ {{123456789, 123456789}} }}} }