Parse successful

<Dataset xmlns="http://xml.opendap.org/ns/DAP/4.0#" xml:base="file:dap4/test_simple_6.3.xml" dapVersion="4.0" dmrVersion="1.0" name="test_simple_6.3">

    <Structure name="s">

        <Int32 name="i1"/>

        <String name="s"/>

        <Structure name="inner"/>

    </Structure>

</Dataset>

<Dataset xmlns="http://xml.opendap.org/ns/DAP/4.0#" xml:base="file:dap4/test_simple_6.3.xml" dapVersion="4.0" dmrVersion="1.0" name="test_simple_6.3">

    <Structure name="s">

        <Int32 name="i1"/>

        <String name="s"/>

        <Structure name="inner"/>

        <Attribute name="DAP4_Checksum_CRC32" type="String">

            <Value>63dceb61</Value>

        </Attribute>

    </Structure>

</Dataset>

The data:

{ { 123456789, "Silly test string: 1", {  } } }